Dakota 4WD V6-3.9L VIN X (1997)
Washer Fluid Level Indicator: Description and Operation
SYSTEM OPERATION
The low washer fluid warning lamp gives an indication when the fluid level in the washer fluid reservoir is too low. The instrument cluster
circuitry lights the lamp for about two seconds when the ignition switch is turned to the On position as a bulb test. After the bulb test, the
instrument cluster circuitry controls the lamp based upon a hard-wired input from the washer fluid level seasor
The washer fluid level sensor uses a float in the reservoir to monitor the fluid level. The up and down action of the float opens or closes the switch
within the washer fluid level sensor that provides a ground signal to the instrument cluster circuitry
If the instrument cluster circuitry senses a ground input from the washer fluid level sensor for more than sixty seconds, it turns on the low fuel
warning lamp and sends a chime tone request to the Central Timer Module (CTM). This helps to reduce the effects of fluid sloshing within the
reservoir. This lamp also latches. Once the lamp has been turned on, it will remain on until washer fluid is added to the reservoir and the ignition
switch is cycled.
The standard washer fluid level sensor is mounted on the inboard side and near the front of the washer reservoir. A barbed nipple on the sensor is
press-fit into a rubber grommet seal installed in a hole in the side of the reservoir.
When the fluid level in the reservoir falls below the pivoting float on the sensor, the float changes position and closes the internal switch contacts
of the sensor. Refer to Wiper and Washer Systems for diagnosis of the low washer fluid warning lamp and circuit, including the sensor.
The washer fluid level sensor cannot be repaired. If faulty or damaged, the sensor unit must be replaced.
CIRCUIT OPERATION
Circuit G29 connects the low washer fluid switch to the warning lamp in the instrument cluster. When the low washer fluid switch closes, it
connects circuits G29 and Z1. Circuit Z1 provides a ground path, illuminating the warning lamp. Circuit Z1 also provides ground for the
windshield washer pump motor.
