Trailer Lights Nightmare
 

Installed brand new trailer light kit today and the passenger side works great but the drivers side trailer light stays lit like the break is on and the blinker does not work>?

Checked all wiring, checked the adapter to make sure the pins are in the right place, removed the trailer wire harnes to the suv, made sure all the pins are in the correct place with the adapter, ground was loose, fixed it, ground had broke away from the trailer to that I had just put on when I took it to the store to get some dip, Fixed that also. sitll no dice, messing with the wiring inside the light that stays lit, seems fine, turned on hazzard lights 5 times still nothing.
sitting here with what's left of my hair in my hand that I pulled out.

:sad::cry:

what is the suv?? some truck brands require a spliter from that dealer to make things work right?

Do you have a test light? Seems that you have power on the connection at the suv. You need to work from the light forwards until you find where the short is. What connector do you have, 7 way round or 4/5 flat?

First, make sure it's not the fixture. Switch it with the one that does work correctly. If it stays the same it's in the wiring, if not then it's in the fixture. Once you have that resolved, take a test light and check each wire to ground of your trailer to make sure there's no short. If there's no short then it's in your plug.

SUV = 1999 Ford Expedition 5.4L V8
My cousin has the tester and he said he would come by today and check it for me.

Sounds like you reversed teh yellow and brown wires when you hooked them up.

well, I had thought that also so I switched them and it didn't even light up.

Are these LEDS? If so they may be miswired inside and has the ground reversed with one of teh tail lights(seen it before). Or you don't have a good clean ground going to the lights and they are backfeeding.

make sure you have a good ground from your truck to your trailer, grounding thru the trailer ball doesn't get it. take a jumper wire and ground the trailer to the chassis of the truck, see if that helps, if it does, start looking at the white wire

Totally agree...Always a good idea to look at the ground first. And you MUST wire the white wire directly to the trailer.. the trailer ball is a great way to get a poor ground.
But he said that the one side works great, so that doesn't sound like a bad ground at the hitch. It "might" be a bad ground at the trailer light itself, where the pigtail wire from the light gets put over the bolt, but I tend to doubt that also. I think Ferm might be on to something with the miswire internally, which is why I said to switch lights and see if that solves the problem. If it does then you know it's the light and not the wiring. If it doesn't then you know it's in the wiring somewhere.