testing used a/c

[wiredgeorge]

Picked up a used a/c. It is an older Dometic Brisk and a bit larger than the current models. It came off an Airstream that folks were rehabbing and they put a low profile unit on and told me the old one worked fine. Paid a nominal amount but would like to test it prior to hauling to the roof of my RV. Have the bottom (non ducted) control panel for the inside which came with the unit. These things have a couple wires for pos/neg and probably a ground (don't recall). Can I test the unit by just rigging an extension cord to it and tying the wires to test the thing?