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Dash cluster will not light up in daytime, but works great at night?

Tiny
GOLFBASSIN
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 114,000 MILES
My dash Cluster will not light up during the daytime, but at nighttime when the Headlights are on it works fine. The dimmer switch works, and it is backlit great. I cannot see during the daytime. Why does it not light up in the daylight hours?
Wednesday, June 14th, 2023 AT 4:39 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
I would check the TBC 2A fuse on the left side of the dash fuse panel, here is a guide to help:

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

If the fuse is okay, it sounds like the BCM is going out but to be sure we should do a CAN scan. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is how to change the BCM out and the instrument cluster wiring diagrams so you can see how the system works. You can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what happens.
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Thursday, June 15th, 2023 AT 1:30 PM

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