Thanks for the suggestions guys, but I don't think that the switch is the problem.
I did the following:
1. I shorted the middle wire, (red pos), to the other connectors with no results.
2. I used a 12v test probe hooked to the chassis ground, no results.
3. I tested all the leads with a multimeter, not even a minimal voltage.
They way it's been acting makes me think that there is a bad relay somewhere in the line, but I can't find one. I've been trying to go through the wiring diagram for the coach, but I haven't found the switch yet, it seems Damon made them for people with a greater electrical knowledge than me!
Any other suggestion?
Thanks!
EDIT: It seems that I only have a wiring diagram for the chassis, not the coach itself. I'll start Googling to see if I can find one.