Part 2 of 3

Fig.2 Rear Washer Plumbing:

REAR WASHER HOSES/TUBES
The rear washer plumbing consists of small diameter rubber hoses and molded plastic inline connector fittings. The washer reservoir hose is connected to the barbed outlet nipple of the rear washer pump/motor unit below the left front wheel house extension and routed up the washer reservoir filler neck to the engine compartment. Just rearward of the washer reservoir filler neck in the engine compartment, an inline connector with barbed nipples joins the reservoir hose to the engine compartment hose. The engine compartment hose is routed along the top of the left front fender wheel house to the dash panel. The engine compartment hose passes through a hole with a rubber grommet in the dash panel into the passenger compartment. Below the instrument panel in the passenger compartment near the left cowl side inner panel, another inline connector joins the engine compartment hose to the A-pillar hose. The A-pillar hose is routed up the left A-pillar to the headliner. At the headliner, an inline connector joins the A-pillar hose to the headliner hose. The headliner hose is routed above the headliner and along the left roof side rail to the rear of the vehicle. At the rear of the vehicle, the headliner hose is routed above the headliner and along the upper liftgate opening panel toward the right side of the vehicle. The headliner hose then passes through a hole with a rubber grommet in the upper liftgate opening panel and through another hole with a rubber grommet into the upper inner liftgate panel to the rear washer nozzle.

Washer hose is available for service only as roll stock, which must then be cut to length. The headliner washer hose is integral to the headliner unit and, if faulty or damaged, the headliner unit must be replaced. The molded plastic washer hose fittings cannot be repaired. If these fittings are faulty or damaged, they must be replaced.

Washer fluid in the washer reservoir is pressurized and fed by the rear washer pump/motor through the rear washer system plumbing and fittings to the rear washer nozzle on the liftgate outer panel above the liftgate glass. Whenever routing the washer hose or a wire harness containing a washer hose, it must be routed away from hot, sharp, or moving parts; and, sharp bends that might pinch the hose must be avoided.

Fig.3 Rear Washer Nozzle:

REAR WASHER NOZZLE
The rear washer nozzle is a fluidic type unit that includes an integral check valve. The nozzle is constructed of molded plastic and has a rubber seal and integral snap features on the back of it. The nozzle is secured by a snap fit in a dedicated mounting hole in the liftgate outer panel above the liftgate flip-up glass. Within the rear nozzle body, a small check ball is held against an integral valve seat at the inlet end of the nozzle by a small coiled spring. The rear washer nozzle and check valve unit cannot be adjusted or repaired. If faulty or damaged, the entire nozzle and check valve unit must be replaced.

The rear washer nozzle is designed to dispense washer fluid into the wiper pattern area on the outside of the liftgate glass. Pressurized washer fluid is fed to the nozzle from the washer reservoir by the rear washer pump/motor through a single hose, which is attached to a barbed nipple on the back of the rear washer nozzle. The rear washer nozzle incorporates a fluidic design, which causes the nozzle to emit the pressurized washer fluid as an oscillating stream to more effectively cover a larger area of the glass area to be cleaned. The integral rear nozzle check valve prevents washer fluid from draining out of the rear washer supply hoses back to the washer reservoir. This drain-back would result in a lengthy delay from when the rear washer switch is actuated until washer fluid was dispensed through the rear washer nozzle, because the rear washer pump would have to refill the rear washer plumbing from the reservoir to the nozzle. The check valve also prevents washer fluid from siphoning through the rear washer nozzle after the rear washer system is turned OFF. When the rear washer pump pressurizes and pumps washer fluid from the reservoir through the rear washer plumbing, the fluid pressure overrides the spring pressure applied to the check ball within the valve and unseats the check ball, allowing washer fluid to flow to the rear washer nozzle. When the rear washer pump stops operating, spring pressure seats the check ball in the valve and fluid flow in either direction within the rear washer plumbing is prevented.

Fig.5 Washer Pumps (Viewed From Bottom Of Reservoir):

REAR WASHER PUMP/MOTOR
The rear washer pump/motor unit is located on the outboard side and near the rear of the washer reservoir, between the left front inner and outer fender panels. 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 one of two dedicated mounting holes near the bottom of the washer reservoir. The rear washer pump/motor unit is always mounted in the higher pump mounting hole of the reservoir. A smaller barbed outlet nipple on the pump housing connects the unit to the rear 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 top of the motor housing. The rear washer pump/motor unit cannot be repaired. If faulty or damaged, the entire washer pump/motor unit must be replaced.

The rear washer pump/motor unit is connected to the vehicle electrical system through a single take out and two-cavity connector of the left headlamp and dash wire harness. The washer pump/motor is grounded at all times through a take out of the left headlamp and dash wire harness with a single eyelet terminal connector that is secured under a ground screw to the top of the left inner fender shield in the engine compartment. The rear washer pump/motor receives battery current on a fused ignition switch output (run-acc) circuit through the closed contacts of the momentary rear washer switch within the right multi-function switch only when the switch control stalk is pushed towards the instrument panel. 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 rear washer plumbing, and the rear washer nozzle onto the liftgate glass.