Trailer light problem

[crashin]

This is a multiple part question. This is in regards to a 2005 GMC Yukon XL Denali.

It looks like the previous own fried some fuse panel components at some time in the past. I had to add a fuse for the fog lights and the Left trailer brakes, but I'm still having problems with my trailer lights. I am not getting any lights when the headlights are on.

Brake and turn signals do work.

I believe this may also be a fuse issue, but I'm not sure which fuse it is.

I realize that I also need to get some kind of service manual. What is the most recommended for this vehicle?

 

[chauncey0337]

If you can, check the fuses with a multi meter. Sometimes a good looking fuse can be bad. And if you want to look at a service manual, check this out-
http://tahoeyukonforum.com/forum/showthread.php?t=13127

 

[jpaeltz]

Also be sure to check fuse box under the hood. I had some problem with my boat trailer lights, for some reason you have trailer brake light/signal fuses in the cab and tail light fuses under the hood.

 

[crashin]

I looked at the fuse box under the hood. There was a fuse missing there for my fog lights. There is one marked TRL that I think is for the trailer brakes, but there are burn marks around it and the connectors underneath appear damaged. I'm sure my problem is there. I tried getting a fuse in it, but no success. I'm going to have to pull the box apart to get to the underside.

* Thanks for the link to the Chilton site. I didn't know they had images out there free. I just need to figure out where the trailer wiring will be.

---------- Post added at 04:19 PM ---------- Previous post was at 04:12 PM ----------

I assume the TRL Park is the fuse I'm looking for.

 

[crashin]

Definitely was the suspected fuse. Looks like the previous owner did something dumb and fried it. There was a loose wire that had been crimped together under the fuse block. I wired an inline fuse for it and it is all working now.

Thanks again for the link to the Chilton's. That is going to come in handy. Looks like I will be changing the thermostat today.

 

[chauncey0337]