Hi, I have a 1999 SC2 and the blower motor will not run at any speed. I have checked the fuse, replaced the relay and resistor, ran a couple of wires from the motor to the battery and the motor worked. There is power at the blower motor and it if I turn the switch off the power goes away. Everything seems to be working. Have I missed anything to test?

 

I think the key is in your statement where you (1) "ran a couple of wires from the motor to the battery and the motor worked", and (2) "There is power at the blower motor and if I turn the switch off the power goes away"....

I suspect the return lead in the regular wiring harness from the blower motor back to ground connection point is defective.

 

Ground?

 

Hmmmmm -- my bad. Guess all those years as a "twidget" are catching up with me ... I meant to say "negative return"

 

Thanks, I will take a look at it this weekend.