Need some Jeep help...
Been having some issues with my WJ overheating... I think I have narrowed it down to the fan not operating ( electric fan.... :argh:). The fan itself appears to work when i connect it to a 12v power source, the temperature gauge appears to work correctly, making me think the temperature sender works. My older cherokee had TWO senders , but i can only find one on the newer engine. I can not find a fan relay anywhere in the vehicle, I checked the PDC and the fuse panel , everything appears to be in order , the 40 amp fan fuse has power and continuity through the fuse with the key on.... I am running out of things i can check without a service manual or a wiring diagram...
Does anyone else have a useful idea? I have joined a WJ forum , just waiting to be approved my a moderator before i can post... I am away tomorrow , but I will be back on friday. Thanks bombers! |
A JEEP?? .....
Whatsa matter ?? - diesel too $$$ lol...lol....lol |
I would let the Jeep run. Once it gets to temp see if the harness to the fan get power. Thats a simple way to tell
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I did that , no dice...
and yes , I am too cheap to pay 1.20 for diesel... that , and my truck is non operational... |
Sounds like a bad fan control module!
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Any luck on the JEEP site?
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1 Attachment(s)
Originally Posted by Buckshotmckee
(Post 229879)
Sounds like a bad fan control module!
I was away (on the road) for a few days , so i have not gotten to post on the jeepsunlimited yet. I stopped by the dodge dealer this aft, they told me to check behind the front bumper cover for the fan relay , i have the front end torn apart all the way back to the radiator , and i can't find a relay anywhere... What I have found, in the plug going to the fan, with the key off , one wire has 36 ohms of resistance to ground , the other has nothing... with the engine running cold , the ground wire goes up to 176 ohms of resistance, and the second wire in the plug , reads nothing, with the engine past operating temperature, the ground remains at 176 ohms of resistance , and the second wire comes alive with 14.2 volts. Out of curiosity , i started checking various spots on the body for continuity to ground , it would appear that no matter where i check , there is very high resistance to ground. Right now I think I am up against a very bad ground, I'm going to wait for things to cool down , and then start checking/cleaning grounds and see where that takes me... P.S. - windmills anyone? : Attachment 55608 |
Originally Posted by JKM
(Post 230598)
FCM? this is not a VW :booo: , it's a mopar product :argh: :humm:
I was away (on the road) for a few days , so i have not gotten to post on the jeepsunlimited yet. I stopped by the dodge dealer this aft, they told me to check behind the front bumper cover for the fan relay , i have the front end torn apart all the way back to the radiator , and i can't find a relay anywhere... |
You work at a dodge dealer too? :c::yeah:
I need to purchase more tools... The fan control relay is PWM, and I currently do not have a way to test and see if that is working correctly , so, I am going to assume it is , and purchase a new relay. I took apart the fan connector , and individually connected the wires , and the fan worked for about ten minutes , then the voltage started slowly dropping and the engine started overheating. The relay also got VERY hot at this point , hot enough that I would not touch it. I am going to order a new relay and install it on wednesday when I get home and hope that fixes it. |
I have access to All-Data and I've had my share of Jeeps. The oldest was a '42 Ford GPW.
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