Ok I've had a busy couple of weeks and haven't been able to trouble shoot this at all. I might have some time this week. Where do I look for the relay? Inside or outside of the RV?
I'm pretty sure it's not the motor itself. I've tested the leads going to the motor, and there is no 12v going to motor when there should be. Something is preventing it from getting 12v.
BUT, the actual slide motor still gets voltage. When I hit the "Retract" button, the motor starts for a second, but since the slid is already retracted it stops right after. It's just the locking arm that doesn't want to work.