Originally Posted by Old Rv'er
But which stock headlights do we have now? This would be important so we know which unit to purchase and what adapters, etc we need.
Personally I would never recommend drilling a hole in them. They are supposed to be sealed. Find out why they aren't instead.
I replaced my old headlight assemblies due to yellowing and crazing, not due to moisture in the lights. Never had that problem. There is a whole other thread on what headlights will fit and where to get them. In summary, they are BMW E39 headlights from 528i, a number of model years around the 2000 time frame. There are tons of aftermarket headlight assemblies made for this application. I got the more expensive model from Ebay listed in the other post, with LED angel eyes. They simply bolt on in place of the existing headlights. There are four bolts and one screw holding them in place. (Not overly well done by WRV, I might add.) No adapters. The new bulb assemblies simply plug into the existing wiring system. The halo lights require separate wiring. I simply tapped into the running lights. The LED's are low current draw, so no relay or anything needed. The cheaper CCFL halo's do require an adapter due to voltage requirements and amp draw. I wouldn't go that route.
As Alpine Coach repairs/modifications go, this one is pretty straight forward and a piece of cake. Its only money!