Instrument panel, dimmer switch, hvac lights electrical issue

[03_sierra]

Hey guys. I’ve got an 03 sierra with the auto dimmer switch and slider hvac controls. The instrument cluster works aside from the backlighting. The hvac controls work aside from their lighting. And the dimmer functions as it’s supposed to aside from the two lights for the automatic headlights, the auto on and off light. Everything was working as of yesterday morning and I’m wondering at this point if I’m having a bcm issue? I don’t know. Any insight would be helpful./


Edit: solved! TBC 2a fuse terminals weren’t making connection!

 

[ORVietVet]

Yea, with lighting/electrical issues, we would say to inspect fuses and relays and all of their connections. How did you fix the "weren't making connection" problem that caused a "working one minute and not the next" problem?

 

[03_sierra]

Yea, with lighting/electrical issues, we would say to inspect fuses and relays and all of their connections. How did you fix the "weren't making connection" problem that caused a "working one minute and not the next" problem?

The previous owner installed a spotlight through the a-pillar and shoved some sort of rigged spade connector behind the fuse to power it. It bent the terminal. I bent it back into shape until it held the fuse tightly again.

 

[ORVietVet]

Yea, butchers robbing power where they can. Happens when they don't want to do the research, easily with a 12 volt test light & DVOM, on any of the open spots on the fuse block.