Interior dome lights and map lights not working properly

Tiny
TIM DAVIS4
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 109,000 MILES
My interior dome lights in the back and front map lights up front work fine when you open or close the doors. But if you press the individual buttons to turn each one on both fronts and both rear nothing comes on. This is on a crew cab. It has the push button switches on both the front map lights that you can move around like a ball and the rear ones on each side of the regular center dome light. I've put in new bulbs both LED and regular and nothing happens when you push any of those individual buttons to turn them on. You have to roll the switch on the dash to turn on all the interior lights to get the fronts on but those back two don't do a thing even though i've verified all bulbs work fine. I don't know why the front two will work with the door but push those buttons and they go right out. Those back two on each side of the center one that does work do nothing with their switches. It's like those four buttons are bad but how could four buttons go back all at once together?
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Friday, June 14th, 2019 AT 6:10 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

There are two different power supplies. One for the doors and headlamp switch, and one for the courtesy/map lights.

I have attached a picture indicating both fuses. They are located in the lower left fuse box in the vehicle. Check these fuses and let me know what you find. Here are a few links related to checking fuses, replacing them, and how to use basic testing equipment:

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

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

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

If you have questions, let me know. I'll watch for your reply.

Joe
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Friday, June 14th, 2019 AT 9:05 PM
Tiny
TIM DAVIS4
  • MEMBER
Hey, thanks. I wasn't aware there were 2 different fuses for the lights. Weird they would make 2 separate circuits to 1 light fixture for 2 different things instead of just 1 for the 1. Lol.
I did find out that TBC 2A was the cargo light. TBC 2B is the dome lights on the door open switch. TBC 2C was the manual push on buttons on them. These were located on the inside panel near the center bottom area, or lower front since it's at an angle. It was 15A and it was blown. Probably was blown when a light bulb melted. It looks like 1 might have in the rear dome light before I got the truck used.
Changed that and they work fine.
Thanks again. You guys rock.
Tim
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Saturday, June 15th, 2019 AT 11:10 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome back, Tim. Honestly, I couldn't agree more with you. Exactly why we need so many fuses is beyond my knowledge. Regardless, I'm glad you got it fixed, and you are very welcome.

Feel free to come back any time.

Take care,
Joe
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Saturday, June 15th, 2019 AT 5:35 PM

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