Harness inside roll bar

NYSierra4 · March 30, 2018

I was installing 2 8” RC light bars on my 2017 Sierra all terrain x’s roll bar and noticed a harness was inside the bull bar. Anyone know what that harness goes to? Is it connected to a fuse? Any help is appreciated.

Sent from my iPhone using Tapatalk

wforrest08 · March 30, 2018

For the factory/dealer lights I believe.

NYSierra4 · March 30, 2018

For the factory/dealer lights I believe.

That’s what I figured so it must be ran to a fuse box. I believe if it comes from factory there’s an accessory light button below/on top of the fog light switch which I obv don’t have. If I can find the fuse I’ll buy the factory acc lighting switch and put that in.

Sent from my iPhone using Tapatalk

NYSierra4 · March 31, 2018

So an update... I took off the 3rd brake light and found there were 2 light connectors already wired. I followed the loom to the engine compartment and found where it connects (pic 2). The loom originally had a blk, purple and brown. After the connector there was only blk and purple. The blk was grounded and the purple had a line added to it.. 1 of which went to the fuse box and the other was not connected and just zip tied (pic3). How do i get power to the lights... ps the lights do not turn on when brake is depressed. (Ill add pics on next post since ive been maxed out on space)