Tip - Troubleshooting a Ford Truck Heater | eHow

Troubleshooting a Ford Truck Heater. The heating system in a Ford truck starts at the water pump, which supplies hot water to the heater core through a hose attached to the top of the water pump. The water and antifreeze mixture is directed through the heater core and returns to the intake manifold through a hose attached to the engine side of the...