Abstract: A generator testing appliance for use in servicing an electrical power generation unit that has a generator connected to a controller. Within a cabinet are multiple conductive circuit paths each having an electrically interposed main switch that is mounted to the cabinet. Multiple conductor controller leads are each connected at one end to a first end of a different one of the conductive circuit paths and are connected or connectable at their opposite ends to a different one of the terminals of the controller. Multiple conductor generator leads are connected at one end to the opposite second end of a different one of the conductive circuit paths and at their opposite ends to a different one of the terminals of the generator. Multiple meter test lead ports that are accessible from the exterior of the cabinet are electrically connected to a terminal of a different one of the main switches.