slide-out switch nightmare

I doubt that you will get a schematic for the wiring. In most cases they don't exist. If your slides are hydraulic the only solution would be some form of a valve, whether it's a manual valve or electric solenoid type. If they are electric it shouldn't be very hard to wire in a shut off for each slide. Then when you want to bring them on line you would just have to power them up.

B.O.