Jan,
There is no reset, but there probably is a 400 amp fuse in the battery compartment. But the easy way to determine the source of your problem is to take a meter and check the voltage at the solenoid on the hydraulic pump for the slides. If you have 12V on one of the large terminals, the fuse is good. If you have 12V on both large terminals when the switch is pushed, your switch and solenoid are good, but you have either a bad connection at the motor for power or ground or a bad motor. If you need more help in diagnosing the problem, just call me (713-254-4156).
Gerald