“I’ve pulled 2 different boats and can’t get tail lights to work.”
White-Ground
Brown-Tail/Running Lights
Green-Right Turn/Brake – Remember green has an R in it
Yellow-Left Turn/Brake – Remember yellow has an L in it
Eyecatcher has it. The contact where your brown wire connects to on the truck is the culprit. It’s possible it’s fused.
Easiest way is to take a voltage meter and place it in the connector where your brown wire would go and place the black lead to ground. If you have 12v there after scrapping the inside of the connector a bit, you’ll now to get a wire brush in there and get the green out.
No voltage…start looking for a broken wire, fuse ect leading to the trailer light connector.