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Troubleshooting Reverse Light Function Not Working for New LED Lights on 1990 Jeep YJ

Question:

Ive got 3 wires coming out of my tail lights on a 90 jeep yj and I bought new LED tail lights with four wires and cant figure out what wire goes to what. With the picture I sent I have tail lights blinkers and brake lights but when I put it in reverse none of the lights work

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Expert Reply:

Since I don't know what LED lights you purchased for your 1990 Jeep YJ but I'm pretty sure the 4th wire is for your reverse lights and that you have your ground connected to your reverse light function. For example, the Jeep-Style LED Combination Trailer Tail Light # STL60RLBP for driver side and # STL60RB for passenger side, have 4 wires which connect to the following functions:

White wire for ground
Black wire for tail light and license plate light
Red wire for stop/turn signal
Yellow wire for reverse

Since you have different color wires in your picture than what I referenced you may need to check with the manufacturer of the light you purchased to see what wires connect to what functions and then double check the functions from the wiring on your YJ with a tester like part # PTW2992 to make sure everything is connected properly.

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expert reply by:
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Jon G

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