Like said before, if the main engine's running, the slide won't work. If you didn't have the engine running, and the slide motor won't turn...then start simple and work your way up to complex. Check to make sure that you haven't accidentally disconnected the wire going to the motor. On mine, the wiring harness hangs down slightly below the motor and it's easy to hang the wires with "stuff" that I'm putting in the storage bin. Next, if the wires are connected properly, then you'll want to check with a voltmeter that you are actually getting voltage to the motor. Disconnect the plug and insert the test probes while someone activates the switch inside. If no power, then go to the fuse panel and look for a blown fuse or a tripped breaker. If you have power to the plug and the motor is still not turning, then the only other option is that your slide motor is shot.