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Old 12-30-2010, 12:51 PM   #3
fixit-p
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Join Date: Dec 2008
Location: Yay Area CA
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Re: Windshield wiper motor and Heater Blower problem

Those are separate circuits check the Blower fuse and make sure current is getting to the switch and blower. One thing all circuits have in common is the ground circuit, check to make sure the cab and dash are grounded properly, the windshield wiper switch is a grounding switch which gets grounded from the dash which is grounded through the cab to the battery, the blower motor is grounded through the cab so start there.
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1965 GMC shortwide big window
1969 Chevy C20 long (for now)
2005 Silverado 2500HD Crew Cab


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