Tim, we meet again! <br> <br>I've actually had two sets of wesbar lights, and IMHO, they're the best around. <br> <br>since you say you've doublechecked for good ground contact everywhere, the next most likely culprit would be the wiring harness connection. get both the males and females nice and clean. <br> <br>even though you've got dealer-installed wiring and stuff.... plug the trailer into another vehicle when you get a chance just to check. <br> <br>I know one person who had a 35' trailer, and it turned out that the length of the trailer was causing enough resistance to dim the lights, so he ran a dedicated ground wire from the harness to each individual fixture to solve the problem. HUGE hassle. extreme last resort.<br><br>