heater

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  #1  
Old 10-11-02, 12:08 PM
Waynefp
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heater

I own a 1992 GMC v6 Pick-up ..My heater speed control only works if i set it to a desired speed and get under tha hood and tap on the little switch box on the fan. I have replaced this switch box with 2 new ones and i still have to tap on it to get to start. QUESTION what else could it be??? and where can i get a heater wireing diagram so i can trace it out.???
 
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Old 10-11-02, 12:37 PM
Joe_F
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Where are you buying the relays? Have you tried an OEM GM part?
 
  #3  
Old 10-11-02, 03:49 PM
Member
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
Have you tapped on the blower itself?Maybe tapping the relay is transmitting vibration to the blower motor causing it to run.If so bad blower motor.
 
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