JohnCh
Member
I had my dealer install a factory trailer break today (2017 Ram 1500). When I connected to the trailer, the truck screen did not recognize the trailer so the break didn’t work. The trailer breaks show about 4.5 ohms at the connector to ground and I think that’s about right for the magnets. The truck output pin for the trailer breaks only shows 0.8 to 1 volt, it bounces back and forth, with the knobs squeezed together. It should show 12 volts, right? Any suggestions? Is there some trick to making the truck see the trailer so it sends the volts out? All of the lights work fine. Does anyone know if there is a dedicated fuse in the truck for the trailer break volts?