2004 Envoy 4.2L Fan Clutch problem solved l
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- Опубліковано 3 сер 2024
- i know many ppl has this problem so i thought on recording my way of fixing it
so here it is!!
this video was made on a 04 Envoy 4.2L SLT
had this problem for a few years and i thought it was gone but i guess it wasn’t! as long as the truck was running everything was fine even on slow traffic, however on very hit days with AC running and slow traffic gauge wasn’t staying in the middle as it should and i thought it was my clutch again! had it replaced 2 years ago but every summer is the same story!! 4 days ago y drove about 400 to 500 miles without a problem and towing my jet-ski but 2 days ago i went to a friends house and left the truck running with AC on my girl was in there and when i came back i had a yellow warning light Check your Gages
the first thing i did was to look at my Tem but it was about 3/4 which is high but not as high then i noticed my oil gage was jumping up and down from Zero to a bit above the middle so i dove away and everything seem to go back to normal, next day i drove it to test the fan again and ran AC full blast after a while i noticed the Tem going up again so tha confirmed something was up with my Fan so i decided to look in to it and this was my Fix to this recurring Fan clutch problem!! now it works perfectly i can even hear and feel the Fan blowing way stronger!!
so bottom line you need to make sure you have a good Ground and a good pulse from your ECU even if your fan speed sensor isn’t working ECU will detect it and it’ll still send signal for the clutch to engage as it did on my video i think ECU has a backup program to activate it even without getting feedback from speed sensor just as it did for me..
Good luck Guys
So we have a 2006 GMC Envoy. We were getting code P0526 Clutch Fan Sensor Circuit (and clutch fan wasn't engaging as it was supposed to). Clutch fan was recently replaced. After seeing your video, we didn't even go through the test light process. We just ordered a new 6 pin pigtail plug, replaced the plug and now clutch fan working as it's supposed to and engine light/code is gone. I will note, just as you showed in video, most of the wires on old plug fell out with very little tension. The plug we ordered was an ACDelco 6 pin multi-purpose pigtail. About $35.
Thanks for your excellent demo and fix description. My '40TB FC is just running about 200rpm low all the time. I suspect there isn't enough current to drive the magnet in the EM\fluidic control.
You are the man. You fixed my fan.
Saved my cash.
Before throwing it in the can.
Glad to be able to help! perhaps a head Job was saved by fixing the Clutch! unfortunately in my case before i found the problem My truck overheated and blew my head gasket! i fixed it not knowing the wire was the Issue i thought it was the clutch so i replaced it but during summer i noticed it wasn't stable so thats when i looked deeper and found that famous broken wire 🤣🤣 a bit late hey but at the end it got fixed 🤙
About three years ago we installed a new fan clutch and water pump both GM products. We have noticed earlier this summer the AC while sitting in traffic would get warm. I tried several things and it appeared that it was going to be the clutch fan. While going through UA-cam video clips I noticed yours. Low and behold I move the wire around and as I did that the clutch fan engaged. I later unplugged it sprayed both sides with electrical contact cleaner. So far it’s been working great. Your video saved me from putting on another fan clutch only to have the same issue. Another thing that I was looking at was having the PCM updated. but after tracking it down so far it is really working good and the AC is blowing cold in traffic and while moving. I want to thank you very much for posting your video it really saved me from spending money that didn’t need to be spent. Now later I might have to follow up and replace a wire if it acts up but at least I know where I have to walk. I can’t thank you enough!
im sorry i just noticed you message! Glad to know it helped 👍 Make sure is not a broken wire or you'e risking to over heat it and you know what happens with that 😆 My Fan Works Perfectly after i fixed that broken wire 🫡
Good call check'n powers and grounds! Thanks for the tip!
Great diagnostic process
Great work thanks for your help with this great video
I just got to say your a bad ass dude califas style hell yeahh saludos from. Las Vegas
Gracias Bro 🤟
Great video. 👍
Looks easy. I did some similar on my semi truck.
But my gmc problem is fan is engaged when accelerating from a stop after 10 minutes or so. Not heating just annoying and using too much gas.
@@ksingh631 ECU tell is when to turn on so if is activating too soon either truck is getting hot enough to activate it without you noticing it because gage shows normal Temp. specially while AC is on or it also happens with aftermarket clutches
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nice explain keep up but have a question if i want converaion the fan to electric fan can i take signal tempture from White wire because this wire take postive 12v from relay and the relay take signal from pcm? please replay mn and thanks
may bad i just realized i had a message! im not sure if it'll work becase signal pulsates and doesnt stay on constantly so your fan may turn on and off with signal instead of staying on ! i would have to see how the original fan works to better answer your question
While working on my TB, I left the connector hanging outside and when I closed the hood, I smashed it. The black housing plastic broke a peice off, but everything else looks fine. Now the a/c don't work, not sure if the fan is fully operational. It doesn't overheat, just that the a/c is not working anymore. You think the impact may have damaged the connector internally? Does the fan have to do anything with the a/c
@@FranciscoJavierOutdoors hello! get a plug at the junk there are plenty of TB and Envoys which are the same! One thing you need to be careful , truck may not overheat while Moving because wind is cooling it i had it like that for over a year until one days that was really hot and i was at a red light after getting off the FWY 😩 that it overheated! anyways you are better of replacing the plug its an easy task! AC doesn't have anything to do with Fan other than cooling Condenser, This is what i will do if it was my truck, i'll check if AC compressor is kicking in by turning on AC and visually checking you'll see it the front part rotate and stop, if it doesnt kick in you need to check Relay, Fuse and Gas Pressure, if gas is low it wont turn on! does tha Blower Work you just dont get cold Air?
AC fuse #30 Blower J-case Fuse # 35 AC relay #44 first thing swap #44&45 they are identical see if that fixes AC problem! if it does then u know u need a new relay if it doesn't check fuses mentioned if everything is good Freon may be below spec and wont let the compressor kick in
Say, great video... did you happen to have any codes ?? (Related to the fan) Thanks
No and Thats the problem that you don't see it until its too late! it kind of overheated a bit the first time i saw it but i thought it was a one time malfunctions so i ignored it and the following summer it overheated! i replace the clutch this time but and thought everything was fine but 6 months later i started seen white film under oil Cap and you know what that means!! water going inside the engine head gasket!! so i had head re done thats when i decided to look deeper knowing it wasn't my clutch! and No Codes At all
@quirino18 got ya... I appreciate the info... my old fan didn't seem to Output much, poor ac, tic warm... about 1/2 on the dash... no roar on the initial cold start.. replaced it with a mahle... now I have the p1481, for fan speed... sigh... lol, no codes before the swap... I'll test with the bulb, too, like your video.. appreciate the time..
@@JoelSc14 stick to OE Fan Has An Internal Speed sensor perhaps its faulty if clutch under warranty get it replace usually you get a year warranty
@@quirino18 mahle and bahr supply gm, so its oe , and quality.. definitely has a warranty, rock auto will swap it, but I'll look closely at the connector at the fan shroud... backkprobe, and pin tension and stuff... spun wrenches for 25 years in a past lifetime...
@@JoelSc14 OE its ACDelco OR Delphi
I change a new clutch fan on 03 envoy 4.2 it ran for a little while and shut off and now it won't engage and my truck getting hot
check just as i did if no light either relay is bad or broken cable
I also performed the "signal test" with bulb and it seems that the signal to engage (or in my case disengage, since it runs like crazy all the time) the clutch is sent only within the first 6-7 seconds after the car starts then it disappears. No signal while revving the engine. Also, I am getting codes: P0526 and P0480. Can you please advise when to go next?
May bad! i had multiple messages and didnt know! do you still need help?
if its stuck on remove the relay and see if that makes a difference if it does your relay needs to be replace! you can also swap it with another relay i believe there were 2 that are identical just move them to see if problem goes away then you know for sure that was it
@quirino18 no thanks! I have put a different fan clutch and no problem! US Motorworks is junk!
@@LukeesCZ same with autozone clutches they sound like airplanes and stay constantly on
So I connected the wires the same and the light turns on once the connection is made and remains on. No need to rev. ??????? What do you think is wrong with mine? I also have fan clutch issue of never going faster when temp is high.
im having the same exact problem... did you fix yours?
The electronic clutch was a short lived design and later ditched by GM.
The centre hub/clutch only lasts about 5 years or so and goes bad internally.
Poor quality.
Stuck relay or Power shorting somewhere but most likely relay stuck on
@@RetroCaptainmy clutch lasted 16 years and it was still good but i replaced it when i first had this issue thinking it was bad when it the a broken wire
@@quirino18 my mechanic tried swapping out the wires and it still won't run
140,000mi.
I'm North of Detroit where it was built, and it's cold most of the year.
I first drove it in August during a really hot day it ran at 212⁰. Didn't overheat but pushing it temp wise imo.
Now it's starting to snow here, and it's 209 to 210⁰ rock steady unless I crank the heater on fast. The fan spins slow
Supposedly the clutch is n/g (unless my mechanic missed something).
I was thinking of buying a standard e fan and also transmission cooler for next summer. It needs the tank pump assembly ($$$$) so don't want to spend on the short lived original fan replacement.
I generally like this SUV it's like a medium sized Suburban without the guzzling thirst of the suburban. The down side is the electrical stuff is very low quality.
Speedo and radio both work sporadically because of bad board contacts.
My liftgate also stuck in Lock. Snow melted into it and it's rusted internally.
The other doors were heavily oil sprayed and work like brand new.
El mío suena así a los 1500 rpm y muchos me dicen que cambie el fan clutch pero es nuevo
hijole no savia q tenia mensajes 😂 cuando dices q suena te refieres a el sonido de mi Motor? no es el abanico lo estaba acelerando fuerte eso era
Do you got a mechanic shop cuz I have the same problem with my fan clutch 2003 Chevy trailblazer I live in Gardena
No Bro im a Casual that happens to figure things out!
if your fan is doing the same thing you can start by Swapping your relay i remember there are 2 that are identical so just swap it to start troubleshooting, after put a lightbulb just as i did, when car reaches certain temp. fan should start getting pulsations from Computer so lightbulb should start blinking just like mine if it doesn't you may have broken wire as well! to test this put on end of the bulb in plug power just as i did and the other end to metal (ground) and try again accelerate to 1500rpm to get the signal from computer if bulb blinks after getting ground from metal your ground if bad somewhere! if this is your case you can run a wire from metal to the back of the plug its like running a new wire from fuse box to plug same thing! now to find out if power cable is the problem look at the electrical Diagram and find out which leg from the relay feeds it you can do this by putting a small wire under relay leg and putting relay back in and testing for signal there with either a multimeter if you got one or use the bulb, one end to ground and the other to cable coming out of relay until you find signal leg on relay! if it works right at relay you have a broken positive wire for sure at this point you can do 2 things remove fuse box and try finding the wire on the plug where relay connects which is below fuse box! ones you find the cable you can pinpoint broken area! remove relay and stick a metal paper clip or so to the signal plug then find a way to ground it use a wire from paper clip to metal (disconnect battery and plug from fan) ones you do that use a test light and poke the wire going to fan with test light, light should turn Green (ground) poke from plug going towards fan plug until test light doesn't turn on which is where you passed broken area just go back until you get green light again and figure where it stops turning on thats where broken cable is!!
2- way on the same plug you removed from fusebox you can strip the wire attach a new wire and run a new cable directly to the fan plug which will be replacing broken wire this will be the fastest way if broken wire is the problem
i work in Torrance close to you
The relay fuse number 45 I did not change it
@@user-vf3we4wp3b swap it with the other one it has 2 identical if thats the problem problem should move with relay
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