Hi:
If the blower doesn't work at all, you need to check to see if there is power to the blower motor resister. If there isn't, go to the switch. If there is power to the resister, check for power out of it. If there is power coming out, check all speed levels by changing the switch to see if you get different levels of voltage. If it does, work on all switch settings, replace the motor. If there is is no power out of the resister, or it stays at 12 volts during all switch settings, replace the resister. Most times, ther resister is the problem and it's much cheaper and easier to replace.
Let me know if you have any other questions.
Joe
Nov 6, 2008 at 8:37 PM