SOURCE: 2003 Jeep Liberty heater fan problem
It is the blower motor resistor. Look under the passanger side dash and locate the fan housing (looks round and black in color. Then locate the resistor it will be in that housing usually withtwo ten millimeter nuts or two simple screws holding it in. unplug the harness to the resistor and remove the resistor. Part store price is approx. 50.00. Note: on aftermarket (not Jeep) resistor sometimes you have to modify the housing a little to get it in. Hope this helps.
SOURCE: LOCATION FAN RELAY
The relay is under the right front headlamp assembly and bracket. You can access it two ways. Remove the front bumper facia, headlights, and bracket assembly. The grill is part of the facia and the headlight bracket runs all the way across the front. Or you can remove the right headlamp and use a hole saw to cut through the bracket, it is a plastic material.
SOURCE: I have a 2003 Jeep Liberty. The radiator cooling
no but there are a couple of cooling fan switches that could be causing your problem both are mounted on the motor one near the thermostat housing the other will be in the block one near the thermostat usually controls the fans.
SOURCE: How to change spark plugs on a 2003 jeep liberty?
The plugs are probably under the coil packs, You will see a series of wiring harnesses with 3 or 4 wires in each connector that plug into a square or rectangular piece that is usually bolted down to the center of the valve cover(s). You have to remove these and the plugs are under them. Be gentle with the harness conectors and take your time as the underhood temps tend to make them brittle
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