I have found one of the marker "lights" to have no bulb, no socket, just the outside part. It is the red one on the passenger side, behind the rear wheels. Is this proper?
On the driver's side, in that position, there is a marker/turn signal, complete and operational.
I got down under the coach to reconnect the bulb and socket, but none exists on that side of the coach. In order to reconnect, I will first need to buy some wire, socket, and bulb, and then attach to both the turn and marker circuits. Has anyone noted this oddity on your coaches?