Where is the electric fan thermostat located on a '98 Cherokee with the
4.0? The A/C pressure switch does an override but the regular thermostat doesn't seem to be kicking in properly.- posted
14 years ago
Electric fan thermostat
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- posted
14 years ago
I don't have the manual handy, but you will probably find it on the driver's side of the radiator about 2/3 of the way down. It is just a thermal switch with 2 wires coming off. To test, turn the ignition on and watch the fan (careful, those nylon blades are SHARP!) as you short/open the two pins in the connector. With a/c, the a/c switch and the radiator switch are combined by a diode arrangement to trigger a relay which runs the fan so you have eliminated everything except the steering diode module and the thermal switch so if manually shorting the switch poles works you have to suspect the switch. That does not normally close to something above normal operating temp - the number 210F comes to mind - so you may just not have gotten hot enough yet.