I replaced all four running lights
on my new 1999 Casita
17' SD (used, new to me). As with several other things made by Casita
, they got it wrong here as well. Two of the light
fixtures were right side up (drain hole on the bottom) and two wrong side up (drain hole on top). They were all pretty badly coroded the worst were of course the ones mounted wrong side up.
I removed the old ones by drilling out the pop rivets, disconnecting the wires, and discarded them. Crimped the new wires to old, made sure the drain hole was on the bottom, pop riveted them in place, added a bead of silicone calk (carefull not to cover drain hole), and then replaced the lens.