Check the fuses in the BCC (Battery Control Center) as mentioned by Cliff.. My BCC is under the hood, just below the brake master cylinder.
ALSO
There are individual 3 amp fuses on the controller for each of the solenoids (4 total). AND, There is a 10 amp fuse in the wire bundle where it plugs into the tank/pump assembly.
On my PG controller, The engine needs to be running, the parking brake set, and the shifter in PARK..
Below is a link to one of the PG manuals I have..
http://1999southwind.com/DOWNLOAD/PowerGear_Manual.pdf
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