Originally Posted by Bama Rambler
Here's how that switch is normally wired for slide and awning operation. It doesn't look like yours matches this unless there are some splices in the wiring.
Does that switch have a wiring diagram or other info on the other side of it?
P.S. You can swap Power Supply and Motor leads and it'll still work.
The switch wiring is intuitive. At each side, the center terminal connects to one end terminal or to the other end terminal or neither (in the middle, center off), depending on switch position
Look closely at the picture, and remember, red+black goes to the motor
This one is fed in the reverse of your drawing. Power comes in the left end, and crossed over into the right end. The motor current comes out the center.
On the connectors at the left end are those little 2-to-1 Fast-On connectors. One of the two wires at each of the left end is a short jumper that makes the X crossover to the other end of the switch. That feed follows the customary RV practice: white = ground, any other color= +12volts. The red paint on the terminal with black wire would confirm +12volts.
Given that information, Rick Brooks can easily do the following test with no test equipment at all.
First take a few more pictures of the switch wiring for yourself in case you get confused later.
Now, look at the two short jumper wires that connect the terminals at one end of the switch to terminals at the other end, but crossed over, side-to-side. Unplug those two jumpers at the left end, so the power wires remain connected. Let the jumpers hang free.
Now one at a time, move the two wires in the center to the terminals you've just vacated at the left end. (This bypasses the switch entirely and connects power directly to the motor.) When you start to connect the second one, you will see a spark. Just make sure the motor runs--you don't have to plug it all the way on.
If you need to run the motor the other way, remove the two wires, cross them over so wires are red-to-white and black-to-black.
If the motor runs fine, then the switch is worn out and needs to be replaced. Put the wires back in the right places so you don't forget, and order a new switch. When the new switch comes, hold it alongside the old one and transfer the wires one at a time, so there's no mistake.
If you cannot figure out where to get the switch you need, post pictures showing all the part numbers you can see.