Tracy according to the service manual it says you should check these things:
- Open/short circuit (includes corroded fuse)
- Blower motor going bad
- Blower motor speed control
- Function switch
- Blower motor relay
You could try cleaning the switch(s) listed above and all associated fuses and relays. Next I would test for power at the motor and work your way back in the circuit. The relay could also be dirty/corroded inside. You'd have to disassemble it if it's dirty. If the coil section is bad you'll need to replace it. They didn't mention it in the service manual but it could also be a bad ground at the relay and/or the motor. If the motor isn't getting any voltage (
and the ground is good) then you'll need to do resistance checks with a voltmeter.
Quote:
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Originally Posted by jrngmn
where is the blower motor resistor block located?
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Ordinarily you'd want to start a new thread
But since you're here already what year car, and which heater system do you have? If it's the 'Auto' climate control system then you can simply put it in self diagnosis mode and it will tell what's wrong
