Compressor Does Not Operate

1. Ground compressor yellow test lead located near compressor.
a. If compressor operates, check height sensor connections. If connections are satisfactory, test height sensor as outlined in ``Height Sensor Operational Test.'' Repair or replace as necessary.
b. If compressor does not operate, remove compressor electrical connector and apply 12 volts and a suitable ground to compressor terminals. If compressor operates, inspect fuses, wires and relay and repair or replace as necessary. If compressor does not operate, check compressor performance. Refer to ``Compressor Current Draw, Pressure Output & Leak Down Test.'' Repair or replace as necessary and retest system.