helped fix trailer brakes on a 92 d250. been an ongoing issue that ended up being an issue in the connector on the back of the truck. it was nice that it was a fairly easy fix but it sucked that it was so much work to track down the issue since it was really noticeable with the 1 trailer and not so much with the other. somehow power was getting from the turn signal wire to the trailer brake wire in the connector. took it all apart tested everything and put it all back together and it was fix. didn't disconnect as single wire at the connector and it fixed itself.