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View Full Version : Gen 3 Coupe LED Tail Lights: I must have missed something.



jdavis500
09-23-2019, 08:59 AM
I am circling back to electrical work on my build. I installed all lights, but never got around to ensure that they all worked and are wired properly. I assume that I have taking a wrong turn somewhere so maybe someone can help. I took my first LED tail light that came with the kit, changed the connector to a waterproof connector, and then connected it to the rear harness. I connected the ground, the tail light wire, and the brake wire. When I turned on my headlights, the low-intensity light worked. Then when I pressed the brakes, the low-intensity light went out and there was no light from the tail light. I took my foot off the brake and the low-intensity light came back on. I disconnected the wires and got out my Power Probe. I tested the wires at the tail light and I got the low-intensity light to come on a few times and then it stopped illuminating all together. The brighter brake light never illuminated. Then I pulled out another tail light, removed the connector and tested with the Power Probe and I get nothing at all. I am sure I did something wrong, but not sure what.

FFinisher
09-23-2019, 09:51 AM
Not sure if this is the cause for confusion, but the LED lights are different than the rest of the world, and the White is the ground.

edwardb
09-23-2019, 11:50 AM
Ron is correct. On those lights, white = ground, black = +12V low intensity, red = +12V high intensity. I too have found that many LED lights come with white as ground. Sometimes marked. Others times, like this one, not.

jdavis500
09-23-2019, 12:16 PM
Humbled again. Thank you for the education. Magically. everything works as advertised when white is the ground.