I have a problem with my lights. I tested my rv plug on the back of my truck and I could not get any power from the tail light terminal. I installed a new rv plug on both the truck and trailer. The problem remained so I figured I would plug in the trailer to make sure. The lights on the trailer worked but with a tester the terminal still has no power. I went on to test the blinkers, they worked just fine with both the tester and on the trailer but my electric brake controller light was blinking real faintly. When I put my foot on the brake the tester then showed power to both the e brake and the tail light terminals. When connected to the trailer I could not test if the brake was actually working but but with my foot on the brake and the turn signals on the light on the e brake controller would flash from bright to dim. Also when I just squeeze the e brake lever the light on the control did not light up. I first thought it to be a bad ground but I am wondering if there might be something going on inside the e brake controller. When testing the rv plug I am grounding to the ground terminal in the rv plug. I unplugged the harness to the plug and there was no corrosion there and It is a new plug. Any help will be appreciated. By the way with and without the trailer connected all the lights on the truck work fine.

 

You have a bad ground on either the trailer, the truck or possibly both.

chaikwa.

 

Are you using the factory connector to hook in the break controler? If so I had one of the pins lose on the ground. Also check your ground pin on your trucks plug, for continuity a bare metal part of the frame. If it audible, shake the wires ging to the truck's plug and see if you hear a sound change. The wires could exposed or corded further back.

 

Yes, brake controllers can and do go bad but I agree with Chaikwa, sounds like you have a grounding issue. Make sure you check your fuses as well.

 

My dad has had 2 brake controllers go bad on his 05, then we bought the maxbrakes and they are darn nice units, but yea, probably bad ground...

 

I guess they could go bad.

I have about 800,000 on my prodigy.

I would look at the connection or the ground.

 

They can go bad, my Jordan did. But be sure the ground and the fuses are OK before getting a new one.

Do your trailer brakes work? That is the main power draw through the controller and it's fuse must be good for them to work.