Electric Fan Relay Replace for 4.0 WJ Jeep Grand Cherokee
Вставка
- Опубліковано 6 лис 2021
- Shown here on my 2002 Jeep grand Cherokee. I set the expectations for an electric fan relay replace and provide high level step by step. This repair does involve heavy disassembly or detailed cutting as well as wiring. Seeking to repair issues with the electric fan coming on leading to over heating.
#jeep #electricfanrepair #electricfanrelay #fanrelay #jeepgrandcherokee #wj #picklesgarage
Thank u
I have an 01 Cherokee laredo. My question, the connector to the relay, 1 of the 4 slots on it is burnt. Should it be replaced also? I connected a junk yard relay and had no luck. Fan is good and fuse up top is good also. Thanks in advance
Yeah I would replace it, they burn out fairly easily. And for your other question, no, the electric fan should only turn on when the engine gets to a predetermined tempature. Which does make it a bit hard to see if it's all working or not but you'll just have to pop the hood after a long drive while it's still running to see.
Another question is does the electric fan turn on as soon as i turn the key? Thanks again . 2001 grand jeep cherokee laredo
Awesome thanks for the feedback brother👍🏽
Great info.. I just changed my thermostat and water pump. Burped the air out ran the jeep in park for 45min. No overheating with the jeep running at 190' temp but the crapy electric fan did not kick on so I will replace coolant thermostat senor and would also do the relay... I do wanna switch to a manual "Dorman fan" 11 blade... this would avoid relay issues. Can I ask you what year your Jeep Grand Cherokee? Reason I ask I saw a video saying the relay is not located in the same spot as in your video for the 2004 Jeep Grand Cherokee 4.0. I don't know if this is true or not guess I'll find out if I decide to stay with electric fan
Yeah I have a 2002, and honestly I'd hope they would've moved it on newer models it's a terrible spot for something that seems to fail pretty often.
I have a 2004 and there is no relay under the plastic cover under the headlight. I got lucky and changed the electric fan motor and all is well.
Correct on the 2004 WJ the relay is now located in the fuse box, 2 of them actually, one for high speed and one for low speed
I have a 02 Grand Cherokee and I am getting the code for the rad fan relay. It would go away at first for a while after I’d clear but recently it’s been coming back often. The fan works just fine and I live somewhere that is pretty cold rn so I don’t really want to be outside cutting. Could it be the fuse causing the code or will I need to replace the relay when it gets warmer
Your car has to go thru a drive cycle after clearing codes so depending on how much you drive after my explain the irregularity with the code coming back. Honestly these check engine codes are pretty basic back then it's really just notifying when it thinks power isn't getting to the relay and therefore it has failed. Curious that the fan would still work if it's not getting power due to wiring issues so it might actually be the tempature sender that's faulty. You should be able to replace the tempature sender, relay, and fuse for well under 100 and I recommend updating it all when you can but if the fan is working I would start with the temp sender, its easy right at the front and cheap on rockauto. Good luck and thanks for watching.
Would this be the best approach to a 2004 Jeep Grand Cherokee throwing up a P1490 code? My jeep isnt overheating or anything like that so maybe it is the fuse that I need to replace?
Yeah mine never threw up any codes it would just over heat. Though mine was messed with a bit before it got to me I think you you are getting an actual code it's related more to fuses than it all together not working like mine. To be honest though I live in a pretty hot environment and my jeep still doesn't overheat except in the drive thru so it's hard to tell outside of popping the hood after a long drive with the engine still going
@@picklesgarage that’s so funny, I had a 1996 Jeep Grand Cherokee that also overheated in a jack in the box drive thru because we had to go though the long line TWICE 😂
@@leytendewitt5675 Nothing like pushing your jeep thru a chick-fil-a line haha
I did this, and when I cut out the plastic under the headlight assembly in the exact spot you did, there was nothing. No relay. The bolt holes are there but the relay is not. I have the 04 Cherokee. So where else would it be???
Unfortunetly that sounds like someone attempted the repair already. You can get to that relay position by taking off the whole bumper which is why it wouldn't need to be cut. Best thing to do is find the fan wires that should come out toward the passenger side and follow the wires. Someone might have put the relay elsewhere with the last repair
There are two radiator fan relays(high/low) in the fuse block to the left of the battery on my 04 Grand Cherokee Laredo 4.0.
But I've done all these and they don't work.
is there any other fuse that's inside the car or something?
Saw this note and wondered if you figured it out? Dealing with same issue rn
Friend, my fan does not turn on, do you think it is that relay? I already saw that the temperature sensor works but it still doesn't turn on, can you give me some advice?
Fan is tempature driven which does make it difficult to confirm if it's not working. If you know for sure the tempature sensor works it will either be a bad relay or issues with the wiring. There are tools out there to confirm but replacing the relay is the most likely cure. I ended up being sick of worrying about the relay working and bypassing it, I have a video on my channel.
@@picklesgarage To verify that the temperature sensor worked, I disconnected it and still did not turn on the fan and looked at the board and it no longer marked the temperature so the temperature sensor is fine
Will not having the fan plugged in effect the jeep starting?
No. The only way messing with anything fan related could affect the jeep starting would be if the battery died because the fan was left on from it being manually bypassed or somehow there is a constant power draw which wouldn't happen from lack of something plugged in. It's just a relay to direct power when prompted but if you have a full battery this wouldn't have anything to do with it not starting.
I have a 04 Grand Cherokee with the 4.0 L, What is another location for this dang relay if it is not under the headlight. .I took the headlight out and cut the hole and nothing except where the manufacturing co. made the screw holes. Now I have notice that my under the hood fuse block does have a Low speed and a High speed Rad. fan relay type of fuse things. My main question is did Jeep make a change in design????
That is strange as far as I know it should still be there. It's possible someone moved it when they repaired it last and they had just taken the whole bumper off. It will be difficult but I'd say you have to find the wires from the fan and try to follow it to location it shouldn't be too far and should still be somewhere on the passenger side, possibly under the fuse box
@@picklesgarage I lifted up the fuse block and even looked under the battery deck, Nothing to be found. It seems that Jeep decided to let the computer tell the fan when to come on. There is 2 relays in the PDC 1 for low speed and 1 for high speed. I'm going to double check the fan to make sure it is not the fan itself before I throw any more $$ at it. Thanks for the reply..
@@papadave5937 I’m having same problem.. Did changing the Low n High speed fuses work?
@@LuisPerez-ki1fq Yes. Haven't had a problem since..
Mines the same way. No relay under the headlight. I've changed both relays and fuse in the box and still the fan only works when it wants to. I've hard wired the fan to the battery to test it and the fan works fine. But where else could this relay be located???
Is this the same as cooling fan motor relay?
Yes this is the relay for the cooling fan motor triggered by high temp.
@@picklesgarage thank you sir for the reply and video
aren't the last two big block relays in your fuse box labeled hi fan, low fan? so how the hell are there three fan relays? hmmm.
No there is only a 40 amp fuse in the box for the fan on this model. 2004 has it in the high and low relay in the fuse box/power distribution box.
ترجمه عربيه
Could This calls A battery to drain down
Not that I noticed in my own case, if you are having to keep restarting your engine over a short period of time that might cause it to drain fast but the sensor in itself shouldn't be causing issues with the battery.
Every time I connect Negative Wire to the Post I can hear the relay Click I was thinking that could be draining my battery do you have any thoughts on this thanks
But the Fan don't cut on until the engine is hot
Hey sorry I was distracted and thought you asked this question on another one of my videos. Yes this can be an issue with the battery draining. I did not have it happen on mine it just wouldn't connect at all but if there is constantly a power it will cause additional issues. Something I have also noticed is people will attempt this repair often and mess it up so if yours is already cut under the light they may have wired it poorly
Thank you for your time and your feedback and letting me know I'll give it a try and I'll let you know how I works out
What year is your cherokee....
2002, it should be essentially the same for all wj Cherokee which is 1998-2004. If yours is outside of that or you want to verify it's still there you can also follow the wires from the fan
@@picklesgarage Mine is a 2004...there is no relay under the plastic under the headlight Assembly. All of that has been transferred inside the fusebox, so I have been told. The wires from the fan connector run into the fusebox directly . I did replace the electric fan and all works well now. I hope this is helpful...p.s. I have 2 relays and a fuse for the cooling fan motor in the exterior fusebox.
I had an awful time removing to old relay switch. There is a red tab that pulls out. and then it still wouldn't come. But this video didn't show what I wanted
Red tab should be the only thing locking it in and needs to be pulled out until it clicks and then around the red tab you have to squeeze while you pull it, standard style locking plug you will find similar on every plug with cars. What else did you notice was missing from the video you can list what you had to do here to help the next guy. Always open for people to add tips, I don't get paid for any of these I'm not big enough, just trying to help make it a bit easier. Thanks for watching.
@@picklesgarage Hey Thanks for the info. I pulled the red tab but there is another little tab on the relay switch. I discovered that after damaging the female side. But not to worry the new switch popped in and that solved the over heating problem. By the way it was done in the past and the hole was already cut. Thanks again, Rob
@robertboothby7640 yeah I am seeing a lot of people have had their previously cut. Similar to my other videos when it comes to sensors it's best to get mopar parts because the cheap ones tend to fail fairly quick.
What model is the jeep you are working on ( 2003 or older )? The 2004 and newer relay is not locatated there is it ?
I threw it in the video description, but its a 2002 base model Jeep Grand Cherokee. Easier to reference the engine if this applies to yours because the 4.0 was availible from 1993-2004. It's a terrible location so I would hope they fixed it but I think it would still apply to the 2004 if you have this engine. I'd try to follow the wires to confirm on yours
@@picklesgarage OK.....thanks PG..... I will do as you suggested.
I have a 2004 and it’s not there.