Lighting Confusion

[trox88]

All of my bulbs on my 05 Tahoe work except the driver side rear running light. The brake works though even though they're the same bulb. Does that mean wiring is loose or something like that? I pulled the housing and even changed out the bulb and saw no issues yet no change.

 

[Fless]

Check the LR park lamp fuse, and if that's good check the relay next to it. Check voltage (+ & -) at the bulb connector. Download the owner's manual.

 

[Doubeleive]

also try cleaning the metal contacts where the bulb goes in, get a small piece of sandpaper or a small flathead screwdriver and scuff the metal tabs, overtime the buildup can make a poor electrical contact, do it even IF IT LOOKS OK. sometimes the buildup is invisible to the eye.
perhaps even give it a little twist from the backside so the metal tab is making a better contact with the bulb legs.

 

[trox88]

Check the LR park lamp fuse, and if that's good check the relay next to it. Check voltage (+ & -) at the bulb connector. Download the owner's manual.

View attachment 444936View attachment 444937

Fuse is good. No clue how to check a relay to be honest.

 

[trox88]

also try cleaning the metal contacts where the bulb goes in, get a small piece of sandpaper or a small flathead screwdriver and scuff the metal tabs, overtime the buildup can make a poor electrical contact, do it even IF IT LOOKS OK. sometimes the buildup is invisible to the eye.
perhaps even give it a little twist from the backside so the metal tab is making a better contact with the bulb legs.

Perfect. I'll try this once it stops raining.

 

[Fless]

You may need to dig into the rear lighting junction block.

 

[trox88]

also try cleaning the metal contacts where the bulb goes in, get a small piece of sandpaper or a small flathead screwdriver and scuff the metal tabs, overtime the buildup can make a poor electrical contact, do it even IF IT LOOKS OK. sometimes the buildup is invisible to the eye.
perhaps even give it a little twist from the backside so the metal tab is making a better contact with the bulb legs.

No luck with this :/

 

[Doubeleive]

No luck with this :/

Have you confirmed the bulb works? Did you try it on the other side swap bulbs? If you have a volt meter?