Dakota 4WD V6-239 3.9L Magnum (1996)
Wheel Speed Sensor: Description and Operation
Four Wheel Antilock Brakes
CIRCUIT OPERATION
The all wheel Antilock Brake System (ABS) uses three wheel speed sensors; a single sensor for both rear wheels and individual sensors for the
front wheels. The single sensor used for the rear wheels mounts on the top of the rear axle differential housing. Each sensor converts wheel speed
into an electrical signal that is transmitted to the Controller Antilock Brakes (CAB). A pair of twisted wires connect to each sensor and provide
signals to the CAB.
Circuits B6 and B7 provide signals to the CAB from the right front wheel speed sensor. Circuit B6, which provides the LOW signal, connects to
cavity 15 of the CAB. Circuit B7 connects to cavity 2 of the CAB and provides the HIGH signal.
Circuits B8 and B9 provide signals to the CAB from the left front wheel speed sensor. Circuit B8, which provides the LOW signal, connects to
cavity 16 of the CAB. Circuit B9 connects to cavity 3 and provides the HIGH signal.
Circuit B114 connects to cavity 14 of the CAB and provides the rear wheel speed sensor LOW input. While circuit B113 provides the HIGH input
to cavity 1 of the CAB.
