When I was under warranty, I brought this issue up to Camping World where I purchased unit. All they did was give me a new rubber cap and filled the inside void with plumbers putty!
I live in the Pacific NW where rain rules the day and water would leak inside the split cap and short out the lights. They would stay on for days until it dried out.
Just this week I finally had enough and removed the switch and a short piece of panel wall just inside and to the left of my drivers side pass thru door (which was just there to hide their terrible wiring job from the mfgr), disassembled the switch, removed the wires and pulled them to the inside of the pass thru. Ran the excess wiring up to a safe point that could be easily reached and mounted the switch and mounting plate inside the pass thru. I open this side of the pass thru 1st when camping as all necessary equipment is there (blocks,pipe,chocks,etc). Made template and cut off a strong piece of plastic the same shape/size as the switch was mounted on, painted it to match the diamond plate, and putty/screwed the plate in place of the old.
No new switch was needed and after I removed the panel wall and rewired their terrible job, I gained about 1 sqft of additional storage, plus saved about $10 using the old switch.
Sorry, I didnt take any pics