Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Instrument cluster (Speedometer, tach, etc…) suddenly lost backlight. Any Ideas?

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Old Aug 13, 2024 | 07:42 AM
  #1  
Tonyp25's Avatar
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Default Instrument cluster (Speedometer, tach, etc…) suddenly lost backlight. Any Ideas?

Never had an issue with this before. H3 has a new battery, stinger terminal connectors and alternator is good too. No issues with anything else.

The backlights for the radio and heating/air all work correctly. The dome lights are good and I’ve tried turning the selector/adjuster next to the headlight **** because I figured I must’ve bumped it and turned the backlights off but that isn’t it either.

I have not checked any fuses yet because I still need to find my fuse tester. I wasn’t sure if there was a fuse that is limited to just the instrument cluster backlights? I would’ve figured the fuse went to all the backlights in the car but who knows. Just wanted to see if anyone had similar issues in the past?
 
Old Aug 13, 2024 | 09:03 AM
  #2  
Doc Olds's Avatar
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You do not need a fuse tester to LOOK at fuse #19 and see if it is burnt.


 
Old Aug 13, 2024 | 02:01 PM
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I had the same problem twice. It was a fuse, but I don't remember the fuse number.

Interestingly for me, pulling and replace the (good) fuse did NOT solve my problem. I needed to CLEAN it with electronics cleaner. Both times.

Just an FYI for when you go chasing fuses - clean them as well.

I wouldn't think it was possible had I not seen it myself. My fuse was not excessively dirty or corroded either.
 
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