I have a 2001 Grand Prix. The heater motor only runs on high which is 5 on the heater switch. It does not run on numbers 1-4. Any suggestions on what to check? Could it be the switch or something else? I did tap around on the heater speed control switch and it worked until the next time I used the car. Any help would be great!!
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If you mean that the Daytime Running Lamps (DRL) does not work when the blower motor does not work, then YES it COULD be an ignition switch problem. However, not very likely (please read on). The regular HIGH and LOW beam headlamps do not require the ignition switch to operate.
The main circuit that runs your regular headlamps also runs the blower motor HIGH speed. This has nothing to do with the ignition switch. This circuit also operates the Power Mirror circuits and the Hazzard Flashers. You may want to check to see if these are also malfunctioning when this happens.
The Circuits for your other blower speeds go through the ignition switch along with the DRL control module, but your HIGH speed does not. So if it is your ignition switch, your HIGH speed should still work and your regular headlamps should still work. You will lose only your lower blower speeds and DRL if it is an ignition switch problem. You will have a bunch of other stuff going out if it is an ignition switch also. The ignition switch circuit that runs your DRL module also runs your Powertrain Control Module. So if it is an ignition switch problem causing your DRL to shut down, your engine will also be shutting down.
I would say your motor went out and the door under the dash is not opening. Follow cable and or vacuum lines . If you have a hand vacuum pump try pumping on the vacuum actuators to see if doors move or if cable is opening doors after you replace motor
no that is your blower motor resistor.
find it in or near the heater box by your blower motor should have 3 wires going to it
remove the connector remove the resistor and replace it, that should solve your problem