HVAC not working

150,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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MYSTICGURU
  • MEMBER
  • 1 POST
Biggest problem is heater control and switches on it does not work. Turn signals don't work. When I apply power to the front heater motor I can vary the speed with its switch. I can not find a complete wiring diagram to troubleshoot it. Also have 12 v going to heater control but only read .9v coming out of the 5 volt reg on the control board of the heater control. Any ideas would be appreciated.
Nov 19, 2019 at 1:18 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,583 POSTS
Hello,

Here is a guide to help with the wiring and the HVAC wiring diagram below to help you see how the system works and which wires to test:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.
Nov 20, 2019 at 11:52 AM
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