Green Wire Trailer Lights. LED lights had been installed on this trailer about a year ago. White wire on lights ground to bolt on light grey wire goes to brown on both sides.
Trailers Lights, Reflectors and Trailer Wiring. Yellow wire to the left turn signal/brake light. To test the other wires, detach the multimeter from the green contact in the trailer plug, and reattach it to whatever contact you want to test.
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When we removed the Jeep's driver's side tail light and pull out the plug, there were only three wires!!!
What doesn't make sense is why BOTH tail lights (powered off the single brown wire) don't work on the trailer!!! Bonded and prelabeled wires for clean and easy installation. Green and brown wires on right, and yellow and brown wires on the left.