RAM 3500 Truck 2WD L6-5.9L DSL Turbo VIN C (2003)
Water Pump: Testing and Inspection
DIAGNOSIS AND TESTING - WATER PUMP
A quick test to determine if pump is working is to check if heater warms properly. A defective water pump will not be able to circulate heated coolant
through the long heater hose to the heater core.