Water Pump

HOW TO DETERMINE THE AUXILIARY WATER PUMP FAILURE

Diagnosis of the component begins with its inspection. Fluid stains on the part surface indicate that integrity of the housing or the seal is impaired.

Then start the engine, switch the heater on to the maximum temperature and listen if the pump started operating. If it does not switch on, use a multimeter or a test bulb to check whether the power cable is serviceable.

The pump must be disassembled for a more comprehensive examination. Corrosion of metal components indicates that the part requires replacement.