Dumbfounded- 04 WJ overheating


I am sure this is not the first post of this kind, but here goes...

i have a 2004 WJ with the 4.0, and i am having overheating issues... I replaced the thermostat and temp sending unit, and the fan still will not kick on when it gets up to operating temperature (or slightly above the normal range). SHe only overheats after long idle, or persistent heavy load. I have switched the two relays in the relay box, and the issue still persists. As a side note, if I turn the AC on, the fan does not turn on. What else could I possibly be missing here? Please give any advice you have, thanks for reading. I tried searching through these threads, but nothing completely applicable comes up.

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  • if you want the fan to work, you should see if you can find a viable replacement, the high speed should be for… more
  • Sounds like it. If you were powering either the high or low speed circuit and getting no movement then likely… more
  • Hey, I took it out and interestingly enough, the high speed worked but the low speed didn't. Still need a new… more