Trailer Wiring

[bloc004]

I have a 5x8 utility trailer with waterproof rear lights. I ran new wires from back to the lights. When using the tester, the tail lights work and the blinkers work alone, but when hooking up the tail lights and the blinkers, the blinker doesnt blink. It seems like the tail light (for lack of a better term) overpowers the blinker and just stays on.

There are 2 red wires, 2 white wires and 2 black wires coming from the lights. I have one black wire grounded and have tried switching the red and white and still cant get the blinker to work with the tail lights.

Any suggestions, I am confused!

[Jeremy airjer W]

I think white is ground and the red and black wires are the power supply for either the tail lights or the blinkers/brakes. I get confused on those sometimes as well.

[bloc004]

White is the ground on the harness, but since I have the black grounded on the light itself and the blinkers and tail lights work individually, it wouldnt work if I have the wrong one grounded, would it?

[Jeremy airjer W]

White is also ground on the tailight not black. Yes they would work in the way you describe because the ground is backfeeding through the unused circuit. There is no where for ground to go when you use both.

[bloc004]

Great, thanks! I will try it again when I get home, an hopefully that will solve the problem.