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Glennc6 04-09-2012 04:04 PM

2002 WJ 12v Radiator Fan T-shooting.
Hi everyone, new member and 1st post.

I recently bought a brand new (to me) 2002 Jeep Grand Cherokee Laredo 4x4 w/4.0 I6.

While doing a tune-up, I noticed the electric radiator fan had blades broken and I then learned about the safety recall F25.

My local Jeep dealer replaced the fan but when I got home I decided to test it out by idling the Jeep with the A/C on maximum and the blower fan on high but the electric radiator fan never came on.

The engine temperature never got much over 210 and the A/C felt like it was blowing fairly cold air, ambient temp was around 80.

My question is, shouldn't have the fan came on and if so what do I need to check? I've already visually checked the 40amp fuse but I am sure there is a relay and or maybe a sensor somewhere that needs to be checked.?.?

Frango100 04-09-2012 04:11 PM

Re: 2002 WJ 12v Radiator Fan T-shooting.
Welcome to the garage.
There is a relay hidden under the passenger side headlight (you have to cut a hole, check out some other threads regarding this). But many times this relay gets bad due to the cooling fan which draws too much current. I don't know how much current draw is normal though, so maybe someone can chime in on this. When switching the AC on, the fan should normally turn on as well, so i wont suspect the temperature sensor in this case.

Glennc6 04-09-2012 04:31 PM

Re: 2002 WJ 12v Radiator Fan T-shooting.
Okay thanks, I remember reading that in a thread somewhere. I did a search, but maybe I didn't search good enough...

Anyway, the relay is cheap so I'll replace it even if it tests good.

Frango100 04-09-2012 06:53 PM

Re: 2002 WJ 12v Radiator Fan T-shooting.
Still strange that the dealer changed the fan and didn't test it for proper functioning.

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