What wire colors connect the rear axle speed sensor on a 1996 Bronco?

The rear axle sensor uses circuit 519 LG/BK (light green/black) and circuit 523 R/PK (red/pink), passing through connectors C205M/C205F and C202F/C202M to the 4WABS Control Module at connector C119.

How does the VSS signal work on the 96 Bronco?

Per the diagram's note, the rear axle sensor monitors rear axle speed via teeth on an exciter ring on the ring gear. As teeth pass the sensor pole piece, an AC voltage with a frequency proportional to average rear wheel speed is induced. The signal is provided to the PSOM, 4WABS, and PCM.

What fuses power the PSOM (speedometer/odometer module)?

The fuse panel supplies a 15A hot-at-all-times fuse on circuit 54 LG/Y (through splice S214) and a 10A hot-in-run fuse on circuit 296 W/P (through splice S242) to the PSOM at connector C252.

What circuit carries the buffered speed signal to the PCM and cruise control?

Circuit 679 GY/BK (gray/black) runs from the PSOM through splice S246 to PCM connector C185 pin 58 and to the Speed Control Servo/Amplifier Assembly at connector C152 pin 3; circuit 901 R/LB returns from C152 pin 10.

Where are the grounds for this circuit?

Grounds go to G100 (see grounds page 10-11) via circuits 57 BK and 676 PK/O, and to G200 (see grounds page 10-5) via 676/675 PK/O through splice S216.

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1996 Ford Bronco Vehicle Speed Sensor (VSS) Wiring Diagram - PSOM, 4WABS, PCM

96 Bronco Vehicle Speed Sensor wiring diagram with PSOM, 4WABS and PCM connectors

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Wiring diagram of the 1996 Ford Bronco vehicle speed sensor circuit showing color-coded wires and module connectors.

AI caption July 2017 · Photo 283 of 386

This is a scanned wiring diagram, labeled "64-1 Vehicle Speed Sensor" and hand-marked "96 Bronco," showing the vehicle speed sensing circuit for a 1996 Ford Bronco. It traces the rear axle sensor (mounted at the ring gear with an exciter ring) through connectors C404, C205M/C205F, and C202F/C202M using circuits 519 LG/BK and 523 R/PK to the 4WABS Control Module (connector C119). Circuit 491 O/LB and 530 LG/Y (through splice S107) carry the speed signal to the Programmable Speedometer/Odometer Module (PSOM) in the instrument cluster at connector C252. Power feeds come from the fuse panel: a 15A hot-at-all-times fuse on circuit 54 LG/Y and a 10A hot-in-run fuse on circuit 296 W/P. The PSOM distributes the buffered speed signal on circuit 679 GY/BK to the overhead console, the Powertrain Control Module (PCM, connector C185 pins 58 and 33), and the Speed Control Servo/Amplifier Assembly (connector C152, with return circuit 901 R/LB). Grounds run via 676/675 PK/O and 57 BK to G100 and G200. Page cross-references are given for the 4WABS module (42-2, 42-3), power distribution (13-10, 13-12), instrument cluster (60-7), PCM (24-2, 25-2), speed control (31-2), and grounds (10-5, 10-11). A callout explains how the sensor generates its AC speed signal.

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Frequently asked questions

What wire colors connect the rear axle speed sensor on a 1996 Bronco?: The rear axle sensor uses circuit 519 LG/BK (light green/black) and circuit 523 R/PK (red/pink), passing through connectors C205M/C205F and C202F/C202M to the 4WABS Control Module at connector C119.
How does the VSS signal work on the 96 Bronco?: Per the diagram's note, the rear axle sensor monitors rear axle speed via teeth on an exciter ring on the ring gear. As teeth pass the sensor pole piece, an AC voltage with a frequency proportional to average rear wheel speed is induced. The signal is provided to the PSOM, 4WABS, and PCM.
What fuses power the PSOM (speedometer/odometer module)?: The fuse panel supplies a 15A hot-at-all-times fuse on circuit 54 LG/Y (through splice S214) and a 10A hot-in-run fuse on circuit 296 W/P (through splice S242) to the PSOM at connector C252.
What circuit carries the buffered speed signal to the PCM and cruise control?: Circuit 679 GY/BK (gray/black) runs from the PSOM through splice S246 to PCM connector C185 pin 58 and to the Speed Control Servo/Amplifier Assembly at connector C152 pin 3; circuit 901 R/LB returns from C152 pin 10.
Where are the grounds for this circuit?: Grounds go to G100 (see grounds page 10-11) via circuits 57 BK and 676 PK/O, and to G200 (see grounds page 10-5) via 676/675 PK/O through splice S216.