Check the wiring from the relay to the fan motor, and check the wiring from the fuse block. Basically check all wires that supply power to the fan motor, use a volt meter. Fan Relay (behind headlight, under battery) on the 2001 GC 4.0L are a piece of ****, I change mine almost yearly. The problem is their location, a high heat area prone to the elements. I understand that 2002 and newer, the location was changed and the problem solved. Relay might close the circuit when cold or at reasonable temps, but might open a circuit when it heats up, causing the problem.
Have you tried relacing the engine coolant tempature sending unit.
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yes replaced temp sending unit and blower module
ive had the relay switch replaced sometimes the fan turns on sometimes it doesnt, when i accelerate about 45mph i know the fan cranks on but then it turns off again then overheats. i hear this is a problems with this model 2001 grand cher. lar. inline 6??? 956-579-2301
how about the fan mudule behind the passenger side of the headlight.!!!!!!!!!!!
how about the blower module located behind the passenger headlight?
new fan new relays new temp sensor new pcm fan works when direct wired
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