Expert: Mike Evans - 5/29/2009

Question
Can you tell me how to test a Blower Motor Control Module ?

I am not very handy but I can follow step-by-step instructions very well.

Thanks for your help.

Ray


Answer
    The best way to test the module is to put a voltmeter across the output (the connection to the blower motor) and look at the voltage at each setting.  If it is very low or non-existent, or doesn't change with each setting, then the module is bad.  This is assuming that you have 12V going into the module, which is the first thing you want to check, along with the fuse.