Great video. Excellent explanation and entirely doable by a weekend mechanic. Replaced the thermostat but still overheating so must be in the fan unit. Thanks.
Been there- done that! And my radiator has a crack in the exact same place. I've tried patching it a couple of times with JB Weld, but the patch kept blowing off. I ground the plastic and scraped along the crack to rough it up, then cleaned it with acetone. This time I wrapped a length of wire around the elbow 4 or 5 times and then worked the Weld around, under and over the wire. Hopefully the wire will keep the patch from blowing off again. I'll find out tomorrow! Thanks for helping others with your vids!
I did have the same problem with the 4.0 engine I guess it's a common problem Good thing I caught it on time. Because overheating can kill the engine quick.
This video is in perfect timing. I have a 2000 jeep grand cherokee 4x4 V8. I replaced the radiator, a/c condenser and clutch fan because of front end damage, from an accident. The electric fan still works, but the fan shroud was totally destroyed. My plan is to try and buy one from a scrap yard. So, when I put all this stuff back together I may go ahead and change the relay. Thank you for the information. And I did subscribe and give you a👍
Great job on explaining all. Thanks. I have a '99 and i love it but the fan relay is out...I am assuming. I'm going to bypass all the testing and just replace the unit
I have an 03 and only got the electric, mine has had a history of overheating and I just flushed it completely and found out now my fan isn’t working. Gotta love jeep
Thank you Thunderhead. I have the same jeep, mine started overheating. I was about to change the fan, but followed this video. It was the relay. Thanks again.
I just put mine on a switch. If I'm moving slow like off roading or using the a/c turn it on. Pulls air through the transmission cooler also. Hood struts are about 20 bucks on Amazon. Changed my life lol
Obviously the relay was the main issue here but another thought I had was to make sure that clutch on the mechanical fan is fully engaging when hot, especially with that many miles on it (if it's original). In my experience they slip pretty good as they get older and most people never replace them. If the electric fan ever fails again, it would be good to know that at least the mechanical fan is pulling as much air as it should be.
Can’t argue with that. I have it a good look over - I usually check the play in it every oil change. Definitely would have been a good thing to mention
when i worked as a mechanic about ten years ago, we had to do a lot of these. obviously not only was it not the greatest relay due to failure, but why in the world would it be located there. worst of all, places would charge a customer to remove the bumper and then all they would do is cut that square out.
@@ThunderHead289 : Hey Thunder: My self got a 01 WJ 4.0 With 120k. I going to put a switch on it. Like my PETERBILT truck has one Manually . Thanks / great video.
My 02 grand cherokee was having the electrical fan not turn on and we were able to turn it on by jumping it so the mechanic said the relay was the issue. Will be getting it soon
Damn you are awesome I have been searching for a video that resembled my situation couldn't find one that would help me solve my problem but this video nailed it exactly what my jeep is doing. I have not got to work on it yet because as soon as I seen the video had to comment.update when I check it out let you know if same fix. Thank you
If the genius engineer that decided to mount this fan relay in this spot had to replace one, he would most likely relocate it to a much smarter place...
I replaced mine and still won’t turn on and passed the 210 mark still.. also the plug that connects to the fan is toasted maybe that’s the problem? And I did what you did to the battery and it worked.
thx i have this issue but no clutch fan 01 comes with 2 speed low/high fan when a/c is in gauged note a/c may not work on some models if fan relay is bad can hit a/c button if fan doesnt come on can sometimes be cause relay n fans not turning on i suggest you doing as video you showed to test fan with power extra thank you . least i fixed over heating an a/c blowing @48 degrees again after replacing relay 2 thumbs bud ...
I have a 2005 Jeep Grand Cherokee it's a trying to get hotter than usual but if you turn the AC on a kicks electric fan on I just wonder is the relay bad thank you
Because jeep put the relay underneath the damn bumper. The only way to get to it is to remove the bumper. So most if not all jeep owners cut a hole under the headlamp to access the relay. I’fl you’ve never seen a jeep Cherokee without a cut in the bumper like this under the headlamp, then the relay is original and has never been replaced. I’ve had 2 jeeps and both have that cutout. You can’t see it unless you remove the whole headlight.
I have a 2000 wj with the 4.7 and mine has been getting hot while sitting with the a/c on and cool but not cold air. I popped the headlight out and removed the relay and it cut on. I'm going to guess that I have a loose connection or a bad relay.
Well, I cut my hole but can’t get a tool down into it to remove the bolt from the relay. I’ve got a light, a flex mirror but can’t see anything holding the bolt. It won’t budge. Last time this went bad, I was traveling and the Jeep place charged me $600 to fix it. I got the part this time at Advance for $70.00 and am going to do it myself. Amazon has it for $20.00 but I wanted it today.
That electric connector to the fan is shit i melted 2 of them in a week and exploded a radiator, I couldnt even pull it apart !The relay under the headlight is garbage also so i bought a 40 amp relay and a 40 amp fuse ansd a covered holder and powered the new 40 amp relay off that big bolt next to the alternator that has the positive cable attached to the battery from the alternator . I put a lighted rocker switch in the cab so you can turn the fan on or off in the winter time for faster warm up and hooked it to a switched 12 volt source in the inside fuse box. I installed the common ice cube relay right next to the battery and tossed that flat relay under the headlight in the garbage, solved all my overheating issues
What's up friend hey how did you know that was the problem? It gave you an error code or something, my fan does not turn on, I suspect that it may be that relay
Trial and error. Those of us that own jeeps know without codes. It’s almost always 1 of 3 things. 1.blown fuse 2. Bad fan motor 3. Fan relay under headlight.
I thought the video early on determined the fan was not the issue. At the end of the video the relay behind the passenger headlamp fixed the problem, but if I recall your final synopsis was that it looked like the fan was the issue. ????????.. So was it the relay or the fan ?
.... I determined that the fan was the overheating issue IN THAT it wasn't running. Then we figure out why. You skipped around in the video, didn't you.
@@ThunderHead289 Thanks.... It's all good. I'll look at the video again when I get time and see what happened. I'm having the same issue on my 2004 Grand Cherokee Laredo 4x4 w/4.0 engine.
I have a problem with the fan (Jeep Grand Cherokee - Overland 2.7 Diesel), when I accelerate the fan also runs faster, will the problem be the relais? Meanwhile congratulations on the video !
I have a 99 wj with the 4.7 and mine is out. Just replaced relay, and checked fan...fan does work, the fuse is good I have power up top and power to the relay. Any ideas?
Great hack!! I have a '99 JGC with a 4.0 and up until today a non op elec fan. Replaced the relay (way too expensive) and started the engine. Once I turned on the a/c the elec fan kicked in. When I got home a saw a temp of 198 on an OBD meter with a 195 degree thermostat and with the engine off the elec fan was not on. Question...is the fan only on with the a/c or is it also supposed to kick on at a certain temp? (good thermostat and a new coolant temp sensor). Thanks
I have a 04.. problem of mine is that the fan doesn't work properly without a/c on. With scan tool temp goes to 215° before electric fan goes on. I replaced the 2 Ford style relays in the fuse box (fan1, fan2). Now I'm inclined to change this relay.
Did you find a relay in there on your 04? Yes, two fan relays in the fuse box. Don't know why they would need a 3rd. I can jump either of the two in the fuse box and the fan runs.
I dont find the fan relay on the fender area after drilling a hole😢. 2004 WJ have only 2 relays in the engine area fuse box. Near Battery. I solved my issue repairing the fan motor. The 2nd speed was blown.
2001 Cherokee 4.0 My problem is the fan won’t turn off. Runs until the battery dies. Put it on the charger, fan runs. Can’t get enough charge to start at this point. Would that also be the relay?
Make sure you check your coolant temperature sensor !!, Because a lot of times we replace fans and everything else !!, and it could be something as small as that !! So make SURE !!, you check that sensor before spending all that money on a fan or a relay and on a new radiator !!, Just check the first . NO ?
My 2002 jeep grand cherokee dose not over heat but when i stop and park my jeep it seem hot under the hood, but the temp gauge is good , am I worrying about nothing or shoud i straight wire the fan o it stays on?
The. 04. Freedom. Only has. 2. High low. Relays. In. The fuse box Mine. Was the fan motor. Went out on rhe low side. Got fan through advance auto parts. $105.00
This happened to me (fan not running) but ONLY after I did a coolant system flush and thermostat replacement. Everything was good before besides a semi good battery. Could the fan issue be diagnosed specifically because if the coolant flush?
I have a 2000 jeep grand Cherokee Laredo 4.0. I have no standard connectors. Just the after market wire connectors you get at pep boys. One of the wires (Red) one gets super hot. Thought i had a short cause car would over heat at idle 260. Jiggled the wires and is fine. Fan turns on/off with thermostat but occasionally does not. Maybe the thermo fan switch? It does drop down in speed, i guess when in demand?? There is no mechanical fan, just the electric fan! Should i also have the mechanical fan with this model? So do you think it's getting hot due to the relay or fan motor?? Fan fuse is a 40!
@@ThunderHead289 . Don't have one! Doe's that mean there was one and removed and left only electric fan? The fan had a Chrysler part number sticker on it. So does that mean there is NO Fan relay?? What about my Q? on the red wire getting super hot??
My 04 Jeep GC with the 4.0 L does not have a relay in this location. I am at a loss of where the heck Jeep might have put it. In the fuse block under the hood there iss a low and high speed fan relay type of fuse's, Could they have changed things along the way when the bulit these Jeeps????
@@ThunderHead289 weird year indeed, I have watched many video's and have read many of post on the location. It seems that at some point during manufacturing they decided to let the computer tell the fan when to come on. In the PDC there is 2 relay for the fan , A low speed and a high speed. Thanks for the reply..
2000 Jeep Grand Cherokee Limited 4.7L V8 4x4 and I'm having problems with overheating. Without a/c I can drive all day, stop and go but once I kick on my a/c, my temps rise to 225-235. Both fans spin (Big metal fan spins clockwise while smaller plastic fan spins counter clockwise). New water pump, radiator drained (not flushed) and filled and tstat replaced. Could this be the last piece to my overheating puzzle?
Is my relay going out. Because shortly after my 99 goes past 210 slightly passed the 0 the fan kicks on for a few secs, then the temp drops too the 2 in 210. This is the closest to over heating I would say my jeep has gotten. But was wondering is the fan suppose to always be on? Oh when it does kick on it pulls power, my jeep surges. Is this normal??
I have a 99 and I have the p1491 code as well....my car won’t even start and i just replaced the fan relay under the headlight and put a brand new one and its still not working....any ideas/suggestions?
Just did the same exact thing, (3rd relay in about 8 yrs), worked for a day or 2 then back to overheating. Next, the thermostat.... Still overheating. Systematically replacing everything under the hood 😣 ???
My 2002 Grand Cherokee had the same problem. However the new relay won't work if I bolt it down. It will spark. The only way I can get it to work was to wrap it in electrical tape.
Like to ask you a question I have a 2003 Jeep Grand Cherokee Laredo I have water dripping in my flowboard right underneath my glove box also when I've been riding it and I come up to stop and I switch off it sounds like a big turbo fan is still running underneath my hood could you tell me what that is and what I could do about it Thanks
Sounds like a leak in the heater core; another fun problem. Maybe (and probably), the hoses are leaking. I'd attempt adding some radiator stop-leak and see if that resolves the problem. If so, then there's probably a problem with the heater core and eventually you'll have to dig into it.
@@ThunderHead289 Yes but when i had the relays tested they said they seems fine, but on Jeep.com they said relays can "test" ok but be "stuck"...? true? weird
Mine is an ‘03 and I was told my model didn’t have one behind the headlight - after I cut the hole looking for it. Still at a loss as to why it’s overheating at idle.
Wuss up thunderhead my auxiliary fan on my 03 Jeep Grand Cherokee wont turn off when my car is off and is causing my battery to be drained. I can hear it when my car is off. Do I change the relay switch???
This is the exact issue I’m having with my 2001 JGC, after watching your video and was going to ask the very same question, what to do with the piece you cut out. If I can find a way to screw it back in somehow but I like the idea of the tape since I may never see it again.
Well, I followed the video instructions, cut into the body of the vehicle, replaced the switch and the fan works again! Yahhoooo!!!! The only question in my mind is whether the engine was harmed when it overheated last Thursday after when wife was driving home from work and stop at the drive through at Jack in the Box, it really boiled all the coolant n water in the reserve tank and I had to put 2 gallons of water back in to limp it home... So far, so good. I just pray really hard that everything is going to be just fine. Still praying to Buddha!
I JUST INSTALLED A FAN IN GOT NEW THERMOSTAT 01 4.0L JGC BUT WITH IT RUNNING I STILL GET HIGH TEMP READING GOT FULL COOLANT AND NEW COOLANT TEMP UNIT THEN WHY SO HOT
@@ThunderHead289 well I actually put in a clutch fan about a year ago once I was told my fan motor was shot. That seem to fix the problem until now. Sometimes is can idle for along time and keep a steady temp but then some days it gradually rises past 210.
My mother owns a '04 4.7 V8 grand Cherokee and it has a pretty serious coolant leak but i cant for the life of me figure out where it is coming from, any tips?
The 2000 and up 4L had a thinner head casting, and are prone to crack. If it's leaking into the exhaust port, there is often no signs of a leak, but will loose a good amount of coolant per week of regular driving. You may need to replace the head... not that bad of a job. There a very easy engine to work on.
@@KC-lg7tx Ha! I used that same method while driving back and forth from St. Louis to Denver when I was young and broke. Worked great in a pinch and easy to acquire at any truck stop.
Great video. Excellent explanation and entirely doable by a weekend mechanic. Replaced the thermostat but still overheating so must be in the fan unit. Thanks.
Been there- done that! And my radiator has a crack in the exact same place. I've tried patching it a couple of times with JB Weld, but the patch kept blowing off. I ground the plastic and scraped along the crack to rough it up, then cleaned it with acetone. This time I wrapped a length of wire around the elbow 4 or 5 times and then worked the Weld around, under and over the wire. Hopefully the wire will keep the patch from blowing off again. I'll find out tomorrow! Thanks for helping others with your vids!
Awesome video! 3 yrs old and very helpful. Got a 01 grand cherokee and the elec fan is not working. Thanks for the pointers. Subscribed
I have an 03 and I don’t have a mechanical fan, only electric.
Great video BTW.
I guess I’ll be cutting a hole tomorrow
Thank you so much! Great job on explaining it all got it done in less than 10 minutes!
I did have the same problem with the 4.0 engine
I guess it's a common problem
Good thing I caught it on time.
Because overheating can kill the engine quick.
Your parents are lucky they have you around to fix their jeep!
Running hack jumper wires is "fixing" the issue?
Thank you! 243k on the original 4.0 drivetrain and my relay just went.
This video is in perfect timing. I have a 2000 jeep grand cherokee 4x4 V8. I replaced the radiator, a/c condenser and clutch fan because of front end damage, from an accident. The electric fan still works, but the fan shroud was totally destroyed. My plan is to try and buy one from a scrap yard. So, when I put all this stuff back together I may go ahead and change the relay. Thank you for the information. And I did subscribe and give you a👍
I installed clutch for mechanical fan & fan blade ($100.00) eight years ago. Fan is now always on, don't have to worry about electronic fan failure.
Dude, shut up and get off my channel.
Great job on explaining all. Thanks. I have a '99 and i love it but the fan relay is out...I am assuming. I'm going to bypass all the testing and just replace the unit
I have an 03 and only got the electric, mine has had a history of overheating and I just flushed it completely and found out now my fan isn’t working. Gotta love jeep
Thank you Thunderhead. I have the same jeep, mine started overheating. I was about to change the fan, but followed this video. It was the relay. Thanks again.
No problem my friend, glad it was helpful
I just put mine on a switch. If I'm moving slow like off roading or using the a/c turn it on. Pulls air through the transmission cooler also. Hood struts are about 20 bucks on Amazon. Changed my life lol
Just what I needed to see,thank you so much!!
Obviously the relay was the main issue here but another thought I had was to make sure that clutch on the mechanical fan is fully engaging when hot, especially with that many miles on it (if it's original). In my experience they slip pretty good as they get older and most people never replace them. If the electric fan ever fails again, it would be good to know that at least the mechanical fan is pulling as much air as it should be.
Can’t argue with that.
I have it a good look over - I usually check the play in it every oil change. Definitely would have been a good thing to mention
Nice of you to help your folks out.
Great diagnosis.
What an awful place to have a relay.
when i worked as a mechanic about ten years ago, we had to do a lot of these. obviously not only was it not the greatest relay due to failure, but why in the world would it be located there.
worst of all, places would charge a customer to remove the bumper and then all they would do is cut that square out.
ThunderHead289 that’s the reason I left the Jeep dealership myself. Morally I couldn’t rob people like that it just wasn’t right. Good video man!
@@ThunderHead289 :
Hey Thunder:
My self got a 01 WJ 4.0
With 120k. I going to put a switch on it. Like my PETERBILT truck has one
Manually . Thanks / great video.
0,000,,THE COMPANY HAS 999GMC 9I IN A W59 DEC.AY,
My 02 grand cherokee was having the electrical fan not turn on and we were able to turn it on by jumping it so the mechanic said the relay was the issue. Will be getting it soon
Damn you are awesome I have been searching for a video that resembled my situation couldn't find one that would help me solve my problem but this video nailed it exactly what my jeep is doing. I have not got to work on it yet because as soon as I seen the video had to comment.update when I check it out let you know if same fix. Thank you
If the genius engineer that decided to mount this fan relay in this spot had to replace one, he would most likely relocate it to a much smarter place...
I replaced mine and still won’t turn on and passed the 210 mark still.. also the plug that connects to the fan is toasted maybe that’s the problem? And I did what you did to the battery and it worked.
Awesome video ,thank you
thx i have this issue but no clutch fan 01 comes with 2 speed low/high fan when a/c is in gauged note a/c may not work on some models if fan relay is bad can hit a/c button if fan doesnt come on can sometimes be cause relay n fans not turning on i suggest you doing as video you showed to test fan with power extra thank you . least i fixed over heating an a/c blowing @48 degrees again after replacing relay 2 thumbs bud ...
I have a 2005 Jeep Grand Cherokee it's a trying to get hotter than usual but if you turn the AC on a kicks electric fan on I just wonder is the relay bad thank you
Why did you have to cut to get at the relay?
Because jeep put the relay underneath the damn bumper. The only way to get to it is to remove the bumper. So most if not all jeep owners cut a hole under the headlamp to access the relay. I’fl you’ve never seen a jeep Cherokee without a cut in the bumper like this under the headlamp, then the relay is original and has never been replaced. I’ve had 2 jeeps and both have that cutout. You can’t see it unless you remove the whole headlight.
Replacing the radiator was the hardest one I’ve ever done. You have to take off most of the front end. It’s a bitch.
It's actually quite easy
I have a 2000 wj with the 4.7 and mine has been getting hot while sitting with the a/c on and cool but not cold air. I popped the headlight out and removed the relay and it cut on. I'm going to guess that I have a loose connection or a bad relay.
Well, I cut my hole but can’t get a tool down into it to remove the bolt from the relay. I’ve got a light, a flex mirror but can’t see anything holding the bolt. It won’t budge. Last time this went bad, I was traveling and the Jeep place charged me $600 to fix it. I got the part this time at Advance for $70.00 and am going to do it myself. Amazon has it for $20.00 but I wanted it today.
I change the coolant temperature sensor and that didn't work so I hope this relay is the answer
How did this go for you?
That electric connector to the fan is shit i melted 2 of them in a week and exploded a radiator, I couldnt even pull it apart !The relay under the headlight is garbage also so i bought a 40 amp relay and a 40 amp fuse ansd a covered holder and powered the new 40 amp relay off that big bolt next to the alternator that has the positive cable attached to the battery from the alternator . I put a lighted rocker switch in the cab so you can turn the fan on or off in the winter time for faster warm up and hooked it to a switched 12 volt source in the inside fuse box. I installed the common ice cube relay right next to the battery and tossed that flat relay under the headlight in the garbage, solved all my overheating issues
Great diagnosis thanks
I have a 2000 it has a spot for for a clutch fan do you recommend adding one cause I’m have the same problem as this video
What's up friend hey how did you know that was the problem? It gave you an error code or something, my fan does not turn on, I suspect that it may be that relay
Trial and error. Those of us that own jeeps know without codes. It’s almost always 1 of 3 things.
1.blown fuse
2. Bad fan motor
3. Fan relay under headlight.
Very good video thanks for sharing!!!!!!
I thought the video early on determined the fan was not the issue. At the end of the video the relay behind the passenger headlamp fixed the problem, but if I recall your final synopsis was that it looked like the fan was the issue. ????????.. So was it the relay or the fan ?
.... I determined that the fan was the overheating issue IN THAT it wasn't running. Then we figure out why. You skipped around in the video, didn't you.
@@ThunderHead289 Thanks.... It's all good. I'll look at the video again when I get time and see what happened. I'm having the same issue on my 2004 Grand Cherokee Laredo 4x4 w/4.0 engine.
Uhhhhhhhh I’ve own two 2003’a and neither have the mechanical fan. Wtf? Have I been cheated twice?
I have a problem with the fan (Jeep Grand Cherokee - Overland 2.7 Diesel), when I accelerate the fan also runs faster, will the problem be the relais? Meanwhile congratulations on the video !
Take the big metal fan off nd leave the plastic one only
I have a 99 wj with the 4.7 and mine is out. Just replaced relay, and checked fan...fan does work, the fuse is good I have power up top and power to the relay. Any ideas?
Great hack!! I have a '99 JGC with a 4.0 and up until today a non op elec fan. Replaced the relay (way too expensive) and started the engine. Once I turned on the a/c the elec fan kicked in. When I got home a saw a temp of 198 on an OBD meter with a 195 degree thermostat and with the engine off the elec fan was not on. Question...is the fan only on with the a/c or is it also supposed to kick on at a certain temp? (good thermostat and a new coolant temp sensor). Thanks
I guess Wonder Minds doing the same thing did the relay fix it or what
@@davidmiles4394 no relay did not fix it
Relay wasn't the problem what next???
@@ericivey3721 Seems like the fan kicks on with a/c only. Coolant temp doesn't affect it.
nice job 👍
Mechanical fan clutch is faulty too. Cooling should be maintained without electrical fan.
While you are moving - yes. But when it is hot outside and you are in stop and go traffic that is when the electric fan kicks in.
I have a 04.. problem of mine is that the fan doesn't work properly without a/c on. With scan tool temp goes to 215° before electric fan goes on. I replaced the 2 Ford style relays in the fuse box (fan1, fan2). Now I'm inclined to change this relay.
Did you find a relay in there on your 04?
Yes, two fan relays in the fuse box. Don't know why they would need a 3rd.
I can jump either of the two in the fuse box and the fan runs.
I dont find the fan relay on the fender area after drilling a hole😢. 2004 WJ have only 2 relays in the engine area fuse box. Near Battery. I solved my issue repairing the fan motor. The 2nd speed was blown.
Is there a way to test the relay by itself if you remove it? Great video thanks
why did it over heat and you have a mechanical fan in there?
Good video. How did you fix the crack?
Yes. Terrible place for it to be. Great if was accessable with out cutting.
I have a 2004 model, and it looks like I have the exact same problem. Will my relay also be under the headlight like this one?
2001 Cherokee 4.0
My problem is the fan won’t turn off. Runs until the battery dies. Put it on the charger, fan runs. Can’t get enough charge to start at this point. Would that also be the relay?
More than likely, yes - stuck on
Multi-tools work better , just make sure you don’t dip the blade in too deep
Do my 96 jeep grand cherokee have a electric fan relay under the passenger side ligth for it to stop overheading
Damn dude, is this gonna be a long story?!?
Too bad the engineers decided to hide that relay where you had to cut up the vehicle to access it.
Make sure you check your coolant temperature sensor !!, Because a lot of times we replace fans and everything else !!, and it could be something as small as that !! So make SURE !!, you check that sensor before spending all that money on a fan or a relay and on a new radiator !!, Just check the first . NO ?
The relay on my 99 is in the engine compartment front left... in the long box.
Count yourself blessed
My 2002 jeep grand cherokee dose not over heat but when i stop and park my jeep it seem hot under the hood, but the temp gauge is good , am I worrying about nothing or shoud i straight wire the fan o it stays on?
Thank you
On my 04 grand cherokee laredo 4.0 4x4 my blower motor. Stop. Fan and my turn signal but my hazards work.
Can you please send me the full details of Radiator fan wiring diagram so that I can fix it
Wish I could see the wires, Did you just usr any black and red wire?? learning please reply,
I have the. 04. Freedom. 4.0L. 4X2. Where is the relay located. Mine is. Electric fan.
The. 04. Freedom. Only has. 2. High low. Relays. In. The fuse box Mine. Was the fan motor. Went out on rhe low side. Got fan through advance auto parts. $105.00
This happened to me (fan not running) but ONLY after I did a coolant system flush and thermostat replacement. Everything was good before besides a semi good battery. Could the fan issue be diagnosed specifically because if the coolant flush?
I have a 2000 jeep grand Cherokee Laredo 4.0. I have no standard connectors. Just the after market wire connectors you get at pep boys. One of the wires (Red) one gets super hot. Thought i had a short cause car would over heat at idle 260. Jiggled the wires and is fine. Fan turns on/off with thermostat but occasionally does not. Maybe the thermo fan switch? It does drop down in speed, i guess when in demand?? There is no mechanical fan, just the electric fan! Should i also have the mechanical fan with this model? So do you think it's getting hot due to the relay or fan motor?? Fan fuse is a 40!
A 2000 should have a mechanical fan!
@@ThunderHead289 . Don't have one! Doe's that mean there was one and removed and left only electric fan? The fan had a Chrysler part number sticker on it. So does that mean there is NO Fan relay?? What about my Q? on the red wire getting super hot??
My 04 Jeep GC with the 4.0 L does not have a relay in this location. I am at a loss of where the heck Jeep might have put it. In the fuse block under the hood there iss a low and high speed fan relay type of fuse's, Could they have changed things along the way when the bulit these Jeeps????
2004 is a weird year if I remember right and the relay is under the hood. Do a little bit of googling on its location
@@ThunderHead289 weird year indeed, I have watched many video's and have read many of post on the location. It seems that at some point during manufacturing they decided to let the computer tell the fan when to come on. In the PDC there is 2 relay for the fan , A low speed and a high speed. Thanks for the reply..
2000 Jeep Grand Cherokee Limited 4.7L V8 4x4 and I'm having problems with overheating. Without a/c I can drive all day, stop and go but once I kick on my a/c, my temps rise to 225-235. Both fans spin (Big metal fan spins clockwise while smaller plastic fan spins counter clockwise). New water pump, radiator drained (not flushed) and filled and tstat replaced. Could this be the last piece to my overheating puzzle?
Check your radiator coolant level - I’m willing to bet that you have already fixed it, but your radiator is now low from all the work
@@ThunderHead289 topped off
OEM mopar thermostat?
Is my relay going out. Because shortly after my 99 goes past 210 slightly passed the 0 the fan kicks on for a few secs, then the temp drops too the 2 in 210. This is the closest to over heating I would say my jeep has gotten. But was wondering is the fan suppose to always be on? Oh when it does kick on it pulls power, my jeep surges. Is this normal??
I did the same thing on “hoss “ 01 WJ 4.0
But when it got wet turn on it self.
What a dumb place to put a relay. It should be on the fuse block up top for easy access.
Have you found metal wheels for that dremel?
I guess cutting it up would be faster than removing the whole plastic header
I have a 99 and I have the p1491 code as well....my car won’t even start and i just replaced the fan relay under the headlight and put a brand new one and its still not working....any ideas/suggestions?
Just did the same exact thing, (3rd relay in about 8 yrs), worked for a day or 2 then back to overheating. Next, the thermostat.... Still overheating. Systematically replacing everything under the hood 😣 ???
I thinking to put a manually switch on it.
Great joop , but if you have code 1489,1490 and the car won't start , dose it means fan realy ?
Just replaced fan relay fan is still not working fan works on jumperwires relays good shape still overheating any ideas
My 2002 Grand Cherokee had the same problem. However the new relay won't work if I bolt it down. It will spark. The only way I can get it to work was to wrap it in electrical tape.
It’s a bad unit - like a dead short inside
Like to ask you a question I have a 2003 Jeep Grand Cherokee Laredo I have water dripping in my flowboard right underneath my glove box also when I've been riding it and I come up to stop and I switch off it sounds like a big turbo fan is still running underneath my hood could you tell me what that is and what I could do about it Thanks
Sounds like a leak in the heater core; another fun problem. Maybe (and probably), the hoses are leaking. I'd attempt adding some radiator stop-leak and see if that resolves the problem. If so, then there's probably a problem with the heater core and eventually you'll have to dig into it.
Heater core.
does the 04 not have this relay
You have a part number on that relay?
Mechanical clutch fan?????
I have the same problem. I cut the hole and there’s no relay there. On my 04 Jeep Grand Cherokee
The 04 has the relay under the hood over by the battery. It’s a plug in fuse style relay in appearance. Under a long rectangular cover
@@ThunderHead289 . Where is it on the 2000 grand cherokee Laredo??
@@ThunderHead289 Yes but when i had the relays tested they said they seems fine, but on Jeep.com they said relays can "test" ok but be "stuck"...? true? weird
Mine is an ‘03 and I was told my model didn’t have one behind the headlight - after I cut the hole looking for it. Still at a loss as to why it’s overheating at idle.
Is this same location for 2000 Jeep Grand Cherokee Laredo?
I believe so - 99-2003, then 2004 was slightly different
Wuss up thunderhead my auxiliary fan on my 03 Jeep Grand Cherokee wont turn off when my car is off and is causing my battery to be drained. I can hear it when my car is off. Do I change the relay switch???
Change the relay, it has stuck on most likely!
Unfortunately, my Jeep didn’t have one behind the headlight.
Must be a 2004
Actually, it’s a 2003, but it must have been when they first moved it to the fuse box, or so I was just told. I’ll check it out tomorrow.
screw the electric fan, install a clutch and mechanical fan, never a problem again...did it years ago....
It has a clutched fan. It actually has both
Think I got it though
To test the fan? Yes, I sure did - just random wires to test it indeed
This video could’ve been done in about 2 minutes. Great info, too much talking
I changed the relay and I'm still getting no power
Did you try to cover the hole you made or is it ok to leave it?
coinman1972 I left it, upon closer inspection, it’s in no way a sealed section. When I used to do this at a dealer, we would simply tape it back on.
This is the exact issue I’m having with my 2001 JGC, after watching your video and was going to ask the very same question, what to do with the piece you cut out. If I can find a way to screw it back in somehow but I like the idea of the tape since I may never see it again.
Well, I followed the video instructions, cut into the body of the vehicle, replaced the switch and the fan works again! Yahhoooo!!!!
The only question in my mind is whether the engine was harmed when it overheated last Thursday after when wife was driving home from work and stop at the drive through at Jack in the Box, it really boiled all the coolant n water in the reserve tank and I had to put 2 gallons of water back in to limp it home...
So far, so good. I just pray really hard that everything is going to be just fine. Still praying to Buddha!
I JUST INSTALLED A FAN IN GOT NEW THERMOSTAT 01 4.0L JGC BUT WITH IT RUNNING I STILL GET HIGH TEMP READING GOT FULL COOLANT AND NEW COOLANT TEMP UNIT THEN WHY SO HOT
I have same problem what was the trick ?
Would this be the same on an 04 grand Cherokee that I'm having some overheating problems with?
Check your electric fan relay, the 04 only uses an electric fan
@@ThunderHead289 well I actually put in a clutch fan about a year ago once I was told my fan motor was shot. That seem to fix the problem until now. Sometimes is can idle for along time and keep a steady temp but then some days it gradually rises past 210.
Jeep changed the location of the e-fan relay on the 2004 grand cherokee(4.0). It's in the fuse box.
My mother owns a '04 4.7 V8 grand Cherokee and it has a pretty serious coolant leak but i cant for the life of me figure out where it is coming from, any tips?
The 2000 and up 4L had a thinner head casting, and are prone to crack. If it's leaking into the exhaust port, there is often no signs of a leak, but will loose a good amount of coolant per week of regular driving. You may need to replace the head... not that bad of a job. There a very easy engine to work on.
Easy way: use half,cup of black pepper
Jordan Lord ...Cotton Candy Randy!?? 👍🏼
@@KC-lg7tx Ha! I used that same method while driving back and forth from St. Louis to Denver when I was young and broke. Worked great in a pinch and easy to acquire at any truck stop.
@@KittyCatWalk haha, that's awesome to hear, i've only used it once to help seal my radiator till I could get a new one
Just did a relay
My 2004 has a mechanical fan
Have the same problem but I replaced the rely and fan still not working
Did you make sure that the fan itself works like I did in the video?
thermostat?
Remember the fan kicks in at a certain temperature. I went too a junk yard pulled out 3 relays for $15 first one I tried worked. Give that a go.
i had replaced my coolant thermostat 2 weeks ago, not overheating anymore. 😜
Eli Green me too, and relay.. still overheating
Which degree? 180, 190 ????
@@user-22- . You might wanna think about ignition timing??
My 02 has double the miles
I somehow still have this jeep - now at 220k miles, it's my iowa winter driver only, still going along nicely
What if you replace that part and still wont work ?
Did you verify your actual fan works???
You need new headlights, don't see how you can drive with them like that.....
That's the reason of the front grill bumper 😁
Blah blah. No useful information.