Chinook RV

So the old 89 Ford Chinook has been having a wonderful season of camping so. My remodel and repair projects were mostly put on hold, so we could just go have some fun. But I have a question about those two light switches by the back door. They have never worked, but I assume they must go to the outside light or maybe that clear plastic chinook handle? I was thinking I would like to hook up some light strips under the back steps and connect them to the switches. Can any one shed some light on this topic for me? thanks

On my 2001 they go like this:

1st - to light rear poarch Chinook grab handle and light above it
2nd - light under awning
3rd - Black holding tank light under rig

I nave have #2 & 3 backwards

On my 94, the two switches are:

1. Rear stair inside light strip, clear grab handle, and rear door light.

2. Dump station light.

Thanks for reminder, btw. Dump light went out and I need to clean and replace with LED.

Thank you, you are correct. I just found out the dump light underneath actually works! The others are in rugged shape. See pic. I need to find an LED replacement.