Dakota Quad Cab 2WD V8-4.7L VIN N (2001)
Washer Fluid Level Switch: Description and Operation
The washer fluid level switch is a single pole, single throw reed-type switch mounted on the outboard side of the washer reservoir forward of the washer
pump/motor, in the right front corner of the engine compartment. Only the molded plastic switch mounting flange and connector receptacle are visible
when the switch is installed in the reservoir. A short nipple formation extends from the inner surface of the switch mounting flange, and a barb on the
nipple near the switch mounting flange is press-fit into a rubber grommet seal installed in the mounting hole of the reservoir. A small plastic float pivots
on the end of a bracket that extends from the switch nipple formation. Within the float is a small magnet, which actuates the reed switch. The washer
fluid level switch cannot be adjusted or repaired. If faulty or damaged, the switch must be replaced.
The washer fluid level switch uses a pivoting, oblong float to monitor the level of the washer fluid in the washer reservoir. The float contains a small
magnet. When the float pivots, the changing proximity of its magnetic field will cause the contacts of the small, stationary reed switch to open or close.
When the fluid level in the washer reservoir is at or above the float level, the float moves to a vertical position and the switch contacts open. When the
fluid level in the washer reservoir falls below the pivoting float, the float moves to a horizontal position and the switch contacts close. The switch
contacts are connected in series between ground and the washer fluid switch sense input of the instrument cluster. The switch is connected to the vehicle
electrical system through a dedicated take out and connector of the headlamp and dash wire harness. The switch receives ground through another take
out of the headlamp and dash wire harness with a single eyelet terminal connector that is secured under a nut to a ground stud located on the right front
fender inner shield in the engine compartment. The washer fluid level switch can be diagnosed using conventional diagnostic tools and methods. (Refer
to WASHER FLUID INDICATOR - DIAGNOSIS AND TESTING).
