HVAC control panel does not light up

1991 CHEVROLET SILVERADO
118,000 MILES • 5.7L • 4WD • AUTOMATIC
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CYNDA R
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  • 3 POSTS
We have two panels available to try. Both are black and don’t light up. We checked fuses, they look fine. We jiggled the wires under the hood that go to the panel, but inside it did not flicker on and off at all. We can not locate the LPS fuse to try it. Here is a picture of our fuse box. Where is the LPS located so we can try that?
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Jan 21, 2019 at 10:09 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
Sure is right there - Park LPS here is a guide to help check for power and the wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what happens.
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Attached Media
Apr 30, 2021 at 9:10 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
The Park LPS fuse is 5 amp in the picture you show but it sounds like a bad ground or the HVAC control head is out again is a guide to help check the grounds and the air conditioner wiring diagrams so you see how the system works.

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

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Images (Click to enlarge)
Attached Media
Attached Media
Apr 30, 2021 at 9:10 AM
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