Raider 4WD V6-3.7L SOHC (2007)
Such a drain-back condition could also result in water, dirt, or other outside contaminants being siphoned into the washer system through the washer
nozzle orifice. This water could subsequently freeze and plug the nozzle, while other contaminants could interfere with proper nozzle operation and
cause improper nozzle spray patterns. In addition, the check valve prevents washer fluid from siphoning through the washer nozzles after the washer
system is turned OFF.
When the washer pump pressurizes and pumps washer fluid from the reservoir through the washer plumbing, the fluid pressure (5) unseats a diaphragm
(3) from over a sump well within the valve by overriding the pressure applied to a piston (2) by a spring (1). With the diaphragm unseated, washer fluid
is allowed to flow toward the two washer nozzles (4). When the washer pump stops operating, the spring pressure on the piston seats the diaphragm over
the sump well in the valve and fluid flow in either direction within the washer plumbing is prevented.
