Trailer wiring question

I am re-doing the wiring on a 28′ gooses neck trailer. The l.e.d’s that I mounted on the back have a groundwire, a tail light wire and a brake light wire coming out of the back of them. How do I wire in the right and left turn signal into these lights?

Currently I tried to run both the brake and turn through the brake wire coming out of the back of the light but that is not working. Currently, with the wiring set up like this, I believe that becasue the brake wire runs to both sides and the turn signal wire in attached to the brake wire going into the light, both turn signals are backfeeding through the brake wires and making both lights blink when a turn signal is activated????

Is there a way I can make this work without having to add a seperate turn signal light? PLEASE HELP!!!!

Zach,

First here’s a shameless plug for an article that might help:

Trailer Wiring

How many wires are there coming off the back of the trailer? The new lights you described sound like they are supposed to be used with a four wire system: ground, running lights, right turnsignal/brakes, and left turn signal/brakes. Cars used to be wired like this, that’s why your average boat trailer is wired that way. So if you look at the average boat trailer there would be three wires on each side: ground, running lights, and a trun signal/brake light.

Then Detroit changed things and put the turn signals and brake lights on different circuits. That would add a wire…ground, running lights, left turn signal, right turn signal, and brakes.

Maybe the easiest thing to do would be to have a buddy in the cab hit the turn signals, brakes, and lights and you take a voltmeter and see what wire does what. That’s probably the place to start.

Good luck and PM me if I can help you further.

Rootski

There are five wires that are at the back of the trailer. Brake, tail, left turn, right turn and ground. The problem is that both lights have the turn wire and the same brake wire heading to the light and I believe that is causeing energy from the turn signal that is activated, to feed back through the brake wire and activate the other light as well. I think????

Yup…if the trailer wiring is set up for separate brakes lights and turn signals then you’re going to need different lights. And if you use the ones you have both sides will blink like emeegncy flashers instead of turn signals. Can you take them back and get different ones?

That’s what I thought. THANKS ROOTSKI

Couldn’t he get a Taillight convertor ?

Maybe I am not understanding it right, but shouldn’t he have a green for right, yellow for left and brown for running lights ? How would the brake and turn wires be “feeding” each other ? They should be doing seperate things from the truck back and should not be common other than ground. I am assuming this is a 7 way connector.

big G

They are sperate coming back from the seven way but the light itself only has three wires coming out, a ground, a tail light and a stop. If there was a turning light wire coming out of the back, there would be no problem, but because there are only two power wires coming out of the back of the light and three power wires that need to go into the light, I feed the brake and turn wires both throught the brake light wire coming off the back of the light. What is a taillight converter?

I understand now what your saying. Here is a convertor. It would actually be put between the existing harnass on the trailer and the lights themselves. If you can return the lights, thats probably just as easy.

3 to 2 convertor

big G