Trailer Dome Lights - GMC Denali

[Keith Seymore]

I think there is a fuse that you have to add to the underhood "BEC" ("bussed electrical center").

It is a "J Case" fuse that will get you B+ to your trailer connector at the rear of the vehicle.

See if there is a red "dummy fuse" in the Stud 1 location (location 68). Replace that with an actual fuse.

http://www.autogenius.info/gmc-yukon...e-box-diagram/

I'm going from memory here so I do not recall what size fuse.

K

[Tommy]

When your 7 wire plug setup was wired in to the Denali they may not have used the auxiliary wire. my 95 Silverado won't power up the interior lights of my hallmark trailer but my 2000 K3500 (OBS) will. Same plugs on both. You may find only 6 of the 7 wires are actually being used.


Tommy

[m22mike]

On a gm 7 way connector the center round pin is the auxiliary circuit, Check it for + DC voltage

[Keith Seymore]

...

[Steve A]

Originally Posted by Keith Seymore

I think there is a fuse that you have to add to the underhood "BEC" ("bussed electrical center").

It is a "J Case" fuse that will get you B+ to your trailer connector at the rear of the vehicle.

See if there is a red "dummy fuse" in the Stud 1 location (location 68). Replace that with an actual fuse.

http://www.autogenius.info/gmc-yukon...e-box-diagram/

I'm going from memory here so I do not recall what size fuse.

K

That's what I did on my 2005 Suburban. That took care of it.