Trailer wiring help!
 

Hi,

I am having trouble getting my trailer lights to work properly. I am getting signals working correctly as well as headlights, but the brake lights don't work on the trailer plug. I bought a converter box and found the brake light wire to splice into and now it dings "lamp out" when I hit the brakes and it still doesn't work properly. In fact, now I actually do have a brake light out but the bulb is fine.

Please help if you can, thanks!

Oh, and this is a 2003 Ram 5.7 and it has the hopkins 7 pin and 4 pin plug.

Sounds like you might have wired the converter box wrong

always start with the truck. Does your truck-side plug test properly when you hit the brake? If so, then check continuity in the trailer. I use one of those testers with a light in the handle to check the truck side, and a multimeter to check the trailer side. Most times there is a grounding problem but if you have a turn signal then that probably not for your case since turn and brake are the same. Take it a step at a time, first check the truck output.

Yeah...it's the truck side that is the problem. The problem is, the truck has separate blinkers and brake lights where as the trailer uses the same bulb for both. That converter is supposed to solve my problem, but it doesn't.

I was able to fix my problem. This truck doesn't need a converter. I was using the actual signal wires instead of the trailer wires.