Over heating
05-18-2013, 11:04 PM
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Model: Cherokee
Over heating
i have a 99 jeep grand cherokee 4.7 v8. the electric fan work fine if you put 12v to it. I changed the relay under the right hand side headlight and check all the fuses. What else could it be?
05-19-2013, 02:24 PM
#2
Old fart with a wrench
It may not be getting a signal from the PCM. Check all your wiring for cracks, wear spots and corrosion. The PCM detects engine temp and sends a signal to the relay. Likely trouble spot in under the battery box.
05-25-2013, 12:31 AM
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I checked out the wiring, would not wish that upon my worst enemy. I could not see any problems. I am now wondering if i should wire the fan to run when the engine is on full time? has any one done this? if so how did you go about it?
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