Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
the switch will be set to off and the blower will turn on my itself ?
if you wiggle the electrical connection at the blower motor itself will the blower go on and off ?
no the blower motor connection can be seen under the passenger side of the dash or with popping out the glove box
if its not running with it set to high speed can you see if you have 12 volts at the power wire at the blower with the truck on and blower set to high speed ?
back probe the purple wire to test for volts
if the black is a good ground and the purple IS showing 12 volts the blower motor is bad
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that is correct
if the purple shows 12 volts and the black is a good ground the blower motor is bad