Trailer Right Turn/Brake light not working.

[Axtell]

Have a Chevy 2020 2500HD where the Trailer Right Turn/Brake light is not working.  Lights on the truck itself ok.  I found related fuse 81 blown and replaced it - no help.  TIM fuse 82 is ok.  Problem is present on 3 different trailers.  Any help is mostly appreciated.

 

Thanks!

[asilverblazer]

Start checking the trailer plug or trailer wiring for cause of the fuse to pop.

 

Double check that the fuse you put in is still good. If it is, check voltage at the plug with out a trailer connected. Make sure the truck is putting out 12v on the circuit/pin. 

 

Most problems, especially on newer trucks is trailer related before it is the truck. 

[newdude]

If your truck has the trailer lighting control module, its probably the module that shorted/failed.  

 

Check fuses 63, 82, 74 and 46 in the underhood fuse block for being blown.  We've seen them have a bad fuse on 74 or 46 I think and you remove the old one, put a new one in and it pops immediately.

 

  

Edited June 9, 2023 by newdude

[Axtell]

Thanks.  I forgot to mention I do have 11.5 on the working left side and about 1 volt less on the non working side off the bed connector (no trailer).  The three trailers that have the same issue using the same truck have their own cables.  I will check the other fuses and report back.  Thanks again!