i ordered a light bar for the back of my truck and want to harwire it into the 7 pin. I made a list of the wires and the colors, so I need your help if the colors and the function are the same.

white-ground
orange-power/12v
yellow-left signal
green-right signal
brown-running
grey w/ brown stripe
blue- electric trailer brake which wont be used for the light bar

 

How are you going to turn it on if its wired into that? Just leave it running full time? Also what lights are you going to be using? Because I don't think the wiring in the trailer hookup is big enough.

You'd be better off just running a new power wire from the battery to a relay for them imo.

 

It stays on when the running lights are on. I guess I dont understand what you are saying? im not sure if you know what im talking about.

 

I think pizzaman711 is think of light bar, as in Whelen, not light bar as in line of fire.

You can get right behind the 7 pin, and splice there, that is where I got mine at. I inline solder Tap a 4 pin trailer tow adapter on mine. The other one I did, same thing, but added a 2 pin SAE connector for the reverse lamp circuit.
This way if I ever need to remove it for some reason, I can do it quickly vs cutting the wires. That is just me, I have seen others go direct to it.

Seem to missing some wires in that list :



I did not see the reverse lamp circuit, and I don't know if you are calling power/12v the Trailer Tow battery charge circuit.

 

Ah your right^! I was thinking something like roof mounted with multiple lights, I didn't even think of those little tailgate light bars, my bad haha.

 

I forgot to put in my original post that the grey with brown stripe is reverse. So the diagram you show show be standard for what the wire are for just color might be differant?

 

The color in that diagram is just to point out the different functions.

Just look at the back of the 7 pin trailer tow adapter, the wiring will line up as the standard 7 pin RV plug.