Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello I will help you with your question,
Yes it could be the heater switch. Ant burning or melting of the wire connections can soak up the power needed to run the motor.
Do you have a voltmeter?
Great, with the motor plugged in and the switch on high (Key on) check the black wire at the resistor (plugged in) and see if you have 12 volts there. If no then check the tan wire at the switch. First check that you have 12 volts at both ends of the fuse.
Let me know what you find
Good, just post back on this thread and I am notified. I am here most of the time.