It goes behind the tub in the wall. I looked in the wall but didn't see but I will look again.

The bundle: Blk wire cont.
white cont
brown 12 vlt
green 12 vlt
red 12 vlt
yellow 2 wire cont.
yellow 3 wires cont
yellow 2 wires 12 vlt
That is how they checked out. the yellow 2 wires ched 12 but the rest of the yellow wires checked continuity.

Loss of lights
 

Had a 1990 25ft. RD Classic and we also lost the lights in the front of the trailer.Consulted with our HiLo dealer. Ended up running a wire from the converter on the inside of the wall. Then drilled a small hole on the underside of the cabinet. Must have lifted the bottom inside the cupboard and spliced into the wire bundle. When we ripped walls apart for water damage we found a coroded broken wire behind the ref. Found a aqua wire at Auto Zone that matched the interior. Never caught the wire when raising or lowering. Hope this helps.

I will have to get some help to due that but does make sence and I just bought 50 ft of 12 volt wire. I thank for the help but I am having some medical problems right now so it may be a few days before I can try that fix.