Auxiliary power unit test kit

Claim 1

A test and repair test kit for an auxiliary power unit, the auxiliary power unit having first and second cables to provide electrical out put comprising: a housing; a first cannon plug mounted on the housing to receive the first cable to provide electrical signals from the auxiliary power unit representing the load percent current generated, oil pressure, direct current voltage generated, low oil pressure warning, time total signal, high temperature warning signal, and battery charging amperage, to individual monitoring gages relating to the various monitored engine functions; a second cannon plug mounted on the housing to receive the second electrical cable which provides electrical connections to the auxiliary power unit for the operating functions necessary to start and operate the auxiliary power unit the operating controls including a fuel pump switch, a glow plug switch, and a generator switch and each of the operating functions passing individually through one of the operating controls in the test kit which controls the function; an auxiliary fuel pump connected to a source of fuel and the auxiliary power unit fuel pump; a voltage regulator connected to an external source of power to provide starting and operating power to the APU.