Auxiliary Water Pump: Testing and Inspection
Auxiliary Water PumpDisconnect the black 2-way connector.
The motor operation can be checked by applying battery voltage to pin 1, motor 2-way connector, and ground to pin 2.
Inspect the harness for open circuit or short circuit to ground. repair as necessary. If no harness faults are apparent, renew the Air Conditioning Control Module (A/CCM).
CAUTION: If removed the water pump should not be operated dry, and for a maximum of five minutes when wet. Failing to observe this may result in pump rotor and shaft damage.
The application of reverse polarity voltage at pins 1 and 2 will result in damage to the pumps internal circuitry.