1988 Gmc C1500 Electrical Climate Control Module Since April This Year Bought

1988 GMC C1500
128,000 MILES
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electrical climate control module... since april this year when i bought this truck its happened 5 times it swaps from floor defrost vent ect and even off and clicking everytime it changes and when it goes off the lights go out on it and sometimes flicker. the hot and cold settings and the fan speed are not affected unless it goes completly off. i have replaced the module didnt seem to fix it. so im thinking maybe a bad ground and suggestions?
Oct 26, 2012 at 4:16 AM
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DOCHAGERTY
  • ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
Connector, conductor, component is a good way to look at the troubleshooting process. A bum ground is certainly a possibility.
Oct 26, 2012 at 4:40 AM
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