RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
Windshield Washer Pump: Description and Operation
WASHER PUMP / MOTOR
The washer pump/motor unit is located on the rear of the washer reservoir, near the bottom in the left front corner of the engine compartment. A small
permanently lubricated and sealed electric motor is coupled to the rotor-type washer pump. A seal flange with a large barbed inlet nipple on the pump
housing passes through a rubber grommet seal installed in the dedicated mounting hole near the bottom of the washer reservoir. A smaller barbed outlet
nipple on the pump housing connects the unit to the washer hose.
The washer pump/motor unit is retained on the reservoir by the interference fit between the barbed pump inlet nipple and the grommet seal, which is a
light press fit. An integral electrical connector receptacle is located on the motor housing. The washer pump/motor unit cannot be repaired. If faulty or
damaged, the entire washer pump/motor unit must be replaced.
The washer pump/motor unit is connected to the vehicle electrical system through a single take out and two-cavity connector of the headlamp and dash
wire harness. The washer pump/motor is grounded at all times through a take out of the headlamp and dash wire harness with a single eyelet terminal
connector that is secured by a nut to a ground stud located on the forward extension of the left front fender wheel housing in the engine compartment.
The washer pump/motor receives battery current on a fused ignition switch output (run-acc) circuit through the closed contacts of the momentary washer
switch within the multi-function switch only when the washer button on the end of the switch control stalk is depressed towards the steering column.
Washer fluid is gravity-fed from the washer reservoir to the inlet side of the washer pump. When the pump motor is energized, the rotor-type pump
pressurizes the washer fluid and forces it through the pump outlet nipple, the washer plumbing, and the washer nozzles onto the windshield glass.
