DownTheAvenue wrote:
Those front clearance lights are well known to leak and cause serious issues. When you seal the roof, be sure to pay careful attention to them. The clearance lights on the back, while not subject to the air pressure of moving forward, also deserve attention.
x2 on this. I owned that model and had trouble with the clearance lights. The lens is very close to the bulb, and the heat of the bulb breaks down the plastic and water enters at that point. Also check the gasket of each light. I solved the problem by switching to LED lights. Another big bonus is they got rid of that big over cab window. It was nothing but trouble.