Back Up Lights not working

[emann_01]

i'm betting that it's the backup lamps relay in the underhood fuse box.

Yeah I think this might have something to do with with but unfortunately I dont think its a replacable relay...is this right? I will have to replace the entire underhood circuit board?

Also, could any of this be causing the issues with the license plate lights and the trailer brake wires?

 

[joshcarl]

i found this thread: http://www.gmtruckclub.com/forum/threads/reverse-lights-on-constantly.130727/

it looks like you might need to replace the whole fuse box. maybe you can find someone local that will let you swap them out to test the theory.

 

[emann_01]

i found this thread: http://www.gmtruckclub.com/forum/threads/reverse-lights-on-constantly.130727/

it looks like you might need to replace the whole fuse box. maybe you can find someone local that will let you swap them out to test the theory.

Yeah, I read that exact same thread and thats what led me to think I need the entire cicuit board....

I went ahead and purchased one from gmpartsdirect...should be here Friday. Hopefully this fixes the issues!

I will give an update once I swap them out.

 

[emann_01]

So I swapped out the whole fuse box and problem solved! Reverse lights are working and trailer brake controller is hooked up and functioning.

I still have to get the license plate lamps to work but I think that is a bulb issue.

 

[joshcarl]

good to hear. post up if you need another schematic.

 

[Shimmy23]

To clarify, you replace the fuse box?

GM 19210438

 

[zimcocomp]

i'm betting that it's the backup lamps relay in the underhood fuse box.

I HAVE A SIMILAR PROBLEM ON MY 2013 TAHOE ssv, But where is that relay? I looked in the fuse box and found relating fuses, but not a relay relating to backup lights.

 

[Fless]

I HAVE A SIMILAR PROBLEM ON MY 2013 TAHOE ssv, But where is that relay? I looked in the fuse box and found relating fuses, but not a relay relating to backup lights.

The member you quoted hasn't been on here since 2017, so I wouldn't expect an answer from that party.

You might want to post in a new thread.

 

[petethepug]

I did a quick breeze of all the posts. Do we know what model year truck this is?

Are you running any LED bulbs in the truck?