[scottz]

The "clicking" might be a clue. It is possible you have a battery issue. You could be reading 13.2 volts if your converter is on-line, but the converter on its own will not run the hydraulics; it has to have the help of a good battery. Hooking up to the truck as your dealer suggested may or may not provide enough current for the hydraulics; I doubt it would. A quick test would be to disconnect shore power and then measure your battery voltage. If the voltages drops off quickly, you have a battery issue. If the battery is good, continue as Zach suggested; turn off your battery disconnect for a minute to reset the system.