2021 2500 rear running lights/ one brake light not working

[RyanOBrian]

Hey All. I just purchased a 2021 2500 Cummins Big Horn from a dealer in Boise w/ 65k miles. I got it home... about 3 weeks later, I noticed that both the rear nighttime running lights don't work. And neither does the driver's side rear brake light. Reverse lights and turn signals work fine on both. The passenger rear brake light works fine.

I'm uncertain if they worked before purchasing it or not. I have been towing my 14' raft trailer around a bunch. The trailer lights/ running lights all work perfectly fine. I've also installed a start-x remote start, which works great. I removed it thinking it may have messed with the brake lights... but that didn't fix it, so I re-installed it again.

All the fuses look good... any suggestions? I have an appointment at the dealer next week.

 

[flan]

It will be interesting to see what they find, follow back up with us.

 

[RyanOBrian]

It will be interesting to see what they find, follow back up with us.

Well I'm embarrassed it was just the bulbs that burnt out....

When I went to O'Riley's I asked for some new rear running light bulbs and was told the rear is all LED and it's not going to be that easy. Turns out they were wrong.... Regardless, I'm glad it was an easy fix.