Wiring truck cap 3rd brake light.
Chevy third brake light wire for topper.
Apr 06 2017 6 07pm.
We do not wire the 3rd brake light like this here at a better truck cap hitch.
Me and my circuit tester decided that the installer connected it to the right connector just the wrong color wire.
Another company wired the 3rd brakelight on this cap.
Chevy truck forum silverado sierra gmc truck forums.
Those get wired into your chmsl wire.
I found a connector that comes off of the rear harness but i am unsure what it is for.
I install toppers truck accessories crap all day.
Wiring truck cap 3rd brake light.
I need to wire the center overhead brake light on the topper topper already has the light and it is wired.
If you cant find that just ask.
Hey i found the problem.
The truck has a signal control box or whatever mounted above the spare i assume theres a simple plug and harness that can tap into that controller and then the rest is easy.
Hi all i am trying to wire up my 3rd brake light on my are topper cap and i cannot seem to find the light blue wire that people are talking about tapping into for the brake only signal.
In order to power the third brake light on a truck bed cap you will need the pacer performance 3rd brake light logic module part pp20 702 the reason you need the module is that the brake turn signal circuits and trailer lighting circuits are combined so you need to separate the brake turn signals or else the third brake light would blink when turning.