Ok, that makes sense. You really need a multimeter to help diagnose the problem. The solenoids switch by the two small wires, one is power and one is ground. You need to figure which is switched by the disconnect switch, power or ground. Then determine if in fact, it is being energized properly. The switch is just a momentary contact switch, and the solenoid is latched into its state. Or maybe they are relays. Either way. If you have 12vdc on one side, then it switches ground, if you don't have 12vdc, the it switches 12vdc. And yes, once you have determined this, you can do a momentary test. It should clunk when switched.
__________________
|