Washer Fluid Level Switch: Operation

WARNING: This page is about a different car, the 2006 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

The washer fluid level switch monitors the level of the washer fluid in the washer reservoir. When the fluid level in the washer reservoir is at or above the predetermined minimum, the switch contacts are open. When the fluid level in the washer reservoir falls below the predetermined minimum, the switch contacts of the normally open switch close. The washer fluid level switch is connected to the vehicle electrical system through the washer pump/motor unit take out and connector of the vehicle wire harness. The switch receives a path to ground at all times through another take out of the vehicle wire harness with a single eyelet terminal connector that is secured under a ground screw located near the right headlamp in the engine compartment.

The switch is connected in series between ground and the washer fluid switch sense input to the ElectroMechanical Instrument Cluster (EMIC). When the switch closes, the EMIC senses the ground on the washer fluid switch sense circuit. The EMIC is programmed to respond to this input by illuminating the washer fluid indicator. The washer fluid level switch input to the EMIC may be diagnosed using conventional diagnostic tools and methods.