Greetings, all. I'm new to the group and in need of a little assistance. I have a 1985 Terry Taurus and decided, since the original lens cap was broken, to switch to LED lights. I bought the lights and noticed they had three wires, brown, green, and white. The trailer however has has brown, 2 greens and two Whites. I tried I connected the wires, according to colors, and it acts sporadic at best. It was at one time only working when lights on the tow vehicle were on. Then once the brakes were pushed, goes out completely, and now does nothing at all. I checked the fuse and the grounding point on the frame. All seems well. Any thoughts would be greatly appreciated.Doug

Second green and second white goes to the other tail light.Sounds like a ground issue.Rig has metal skin which in many cases was used as ground path. The connection to the TV was made near the tongue of the trailer.

Forgot to mention this is a right side light. Haven't messed with the left yet. Do you think the second white ground wire should go to the skin, and both greens from trailer to the one green on the light? Sorry, this is kicking my behind. By the way, I'm also USAF retired.

No, the second wire goes to tail light. The first ground may go to the area around the tongue where the umbilical cord connects to the trailer wiring. The white wires should be connected at that point to the TV cord.Green in your right side light as three wires in my thinking. One to the front of the rig, one to the left side light. There would be three green wires connected together and three whites connected together.

This may help!Generic trailer wiring diagramIt shows right tail light feed rear clearance lights. However I doubt it on your rig.

Keep in mind that incandescent bulbs don't care about polarity.... LEDS do. Often when switching to LEDS, the vehicle wiring needs to have the polarity reversed for the LEDs to work.

Installing new tail lights | Good Sam Community

deltabravo
Nomad
May 18, 2020
Huntindog wrote:
Often when switching to LEDS, the vehicle wiring needs to have the polarity reversed for the LEDs to work.

I've messed with hundreds of LEDs in my job. The above has never been the case.
Huntindog
Explorer
May 18, 2020
Keep in mind that incandescent bulbs don't care about polarity.... LEDS do. Often when switching to LEDS, the vehicle wiring needs to have the polarity reversed for the LEDs to work.
enblethen
Nomad
May 18, 2020
This may help!
Generic trailer wiring diagram
It shows right tail light feed rear clearance lights. However I doubt it on your rig.
enblethen
Nomad
May 17, 2020
No, the second wire goes to tail light. The first ground may go to the area around the tongue where the umbilical cord connects to the trailer wiring. The white wires should be connected at that point to the TV cord.
Green in your right side light as three wires in my thinking. One to the front of the rig, one to the left side light. There would be three green wires connected together and three whites connected together.
Cajunguy71
Explorer
May 17, 2020
Forgot to mention this is a right side light. Haven't messed with the left yet. Do you think the second white ground wire should go to the skin, and both greens from trailer to the one green on the light? Sorry, this is kicking my behind. By the way, I'm also USAF retired.
enblethen
Nomad
May 17, 2020
Second green and second white goes to the other tail light.
Sounds like a ground issue.
Rig has metal skin which in many cases was used as ground path. The connection to the TV was made near the tongue of the trailer.

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