2004 Silverado trailer wiring

[joe04]

Good afternoon GM Tech, I've got a 2004 Silverado, with factory trailer wiring and hitch. Just bought it recently. I went to tow trailer, and found NO running lights. Left and Right signal work fine, and ground checks out OK. I've probed at the wiring side of the plug, no 12V to the brown wire. Is this fed from a fuse? and if so, where and how many amp? Truck has Auto feature on the headlight switch, but I am turning it to the On posistion to test. Any help would be greatly appreciated, she's just out of warranty! Thanks in advance.

[joe04]

There's a TRL park fuse in the underhood fuse block.  This is just for the trailer wiring so don't check the fuse for the regular park lights and think all's okay.  Oh, it's a 15 amp fuse.

 

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Thanks GM TECH!!!! That was the problem. And the fuse was from a different manufacturer than the rest, looks like I'll have to keep an eye on this for awhile. Also, for the record, I, and I'm sure others, appreciate all the help you provide for us. Thanks again!

[GM-Tech]

Glad I could help!

[GM-Tech]

There's a TRL park fuse in the underhood fuse block. This is just for the trailer wiring so don't check the fuse for the regular park lights and think all's okay. Oh, it's a 15 amp fuse.