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Re: O3 JEEP HEATING FAN NOT WORKING
Well if you have verified that power is going to the blower motor and it will not turn on then the motor has gone bad. This is assuming that you checked for voltage where it enters the motor and that there was only two wires going into the motor (1 positive and 1 ground). If there is more than 2 wires entering the blower motor, check for voltage on the others.
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check heater/ac fuses first replace if bad..see if there is power to the blower motor connector if so reconnect and check ground wire for the motor.. if still no blow, take motor out and test for operation with 12 volt power supply(battery charger) replace if bad..good luck
It sounds like the blower motor is not working. If you don't hear it running when you switch it on, check the fuse first. If the fuse is OK, you will probably need a new blower motor. It could also be a faulty fan switch or blower motor resistor. Once you remove the blower motor assembly, you can test it by putting battery voltage across the contacts with jumper wires, making sure to get correct polarity. If it does not spin, it should be replaced. If the blower does work when removed, the fan switch is probably at fault. The resistor is usually indicated when the fan works only at certain switch positions, but not all.
this sounds like the blower or switch is bad. to test blower, first check the fuses, then if it still does not work, run 2 wires from a power source 1 for positive and 1 for negative(ground) disconnect connector at fan motor and try these wires to see if it runs. if not replace fan,if it runs on wire but not from switch, replace switch. or check wiring carefully.
never heard of this before ,i have worked on quite a few jeeps here in spain but never had this before .power steering yes ,radiators yes ,funny american electrics big time ,does yours have the manual fan and a back up electric fan or is it all electric fans .Quick tip ----if it starts to run hot ,put the heater on screen and blower on full this will keep the engine cool ,if no heats comes out of heater then stop because you have no water in the rad
If you have Automatic Temperture Control then you will need a blower resistor module which could be around $100 to $200. If you have a manual temperture control then it can be just a simple $20 blower resistor.