What does the rear axle speed sensor do on a 1996 Bronco?

Per the diagram note, it monitors rear axle speed by sensing teeth on an exciter ring mounted 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 in the sensor circuit. The signal is then provided to the PSOM, 4WABS, and PCM modules.

What wire colors are used for the rear axle speed sensor on the 1996 Bronco?

Circuit 519 LG/BK (light green/black) and circuit 523 R/PK (red/pink), running from connector C404 through C205M/C205F and C202F/C202M to the 4WABS Control Module at connector C119.

Which fuses power the PSOM speedometer circuit in the 1996 Bronco?

Fuse 8 (15A, hot at all times) feeding circuit 54 LG/Y, and fuse 18 (10A, hot in run) feeding circuit 296 W/P. The fuse panel is detailed on pages 13-3 and 13-8.

What modules receive the vehicle speed signal from the PSOM?

The 679 GY/BK circuit from the PSOM feeds the Powertrain Control Module (PCM, connector C185 pin 58), the Speed Control Servo/Amplifier Assembly (connector C152 pin 3), and the Overhead Console (see page 102-1).

Where are the grounds for the VSS/PSOM circuit on the 1996 Bronco?

The 4WABS side grounds through circuit 57 BK to G100 (see page 10-11), and the PSOM/speed control side grounds through circuit 875 BK/LB to G200 (see grounds page 10-5).

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1996 Ford Bronco Vehicle Speed Sensor (VSS) Wiring Diagram - EVTM Page 64-1

1996 Bronco Vehicle Speed Sensor wiring diagram 64-1 with PSOM, 4WABS module and rear axle sensor

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1996 Ford Bronco vehicle speed sensor wiring page 64-1: rear axle sensor feeds the programmable speedometer/odometer module (PSOM), 4WABS control module and instrument cluster via 15A fuse.

AI caption January 2016 · Photo 258 of 413

This is page 64-1 of the 1996 Ford Bronco Electrical & Vacuum Troubleshooting Manual (EVTM), showing the complete Vehicle Speed Sensor (VSS) wiring diagram. It illustrates the rear axle sensor (connector C404), which monitors rear axle speed via teeth on an exciter ring; the AC signal it produces feeds the 4WABS Control Module (connector C119, pins 21, 39, 22, 14, 1). The processed speed signal (circuit 491 O/LB) goes to the Programmable Speedometer/Odometer Module (PSOM) in the instrument cluster, which then distributes speed data on circuit 679 GY/BK to the Powertrain Control Module (PCM, C185 pin 58), the Speed Control Servo/Amplifier Assembly (C152 pin 3), and the Overhead Console. Power comes from fuse 8 (15A, hot at all times, circuit 54 LG/Y) and fuse 18 (10A, hot in run, circuit 296 W/P). Grounds are G100 (circuit 57 BK) and G200 (circuit 875 BK/LB). Wire circuit numbers, colors (519 LG/BK, 523 R/PK, 530 LG/Y, 676 PK/O, 901 R/LB, 567 LB/Y), splices (S107, S214, S216, S231, S242, S246), and cross-references to other EVTM pages are all shown, along with component-location grid references (e.g., 151-6 A7).

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Frequently asked questions

What does the rear axle speed sensor do on a 1996 Bronco?: Per the diagram note, it monitors rear axle speed by sensing teeth on an exciter ring mounted 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 in the sensor circuit. The signal is then provided to the PSOM, 4WABS, and PCM modules.
What wire colors are used for the rear axle speed sensor on the 1996 Bronco?: Circuit 519 LG/BK (light green/black) and circuit 523 R/PK (red/pink), running from connector C404 through C205M/C205F and C202F/C202M to the 4WABS Control Module at connector C119.
Which fuses power the PSOM speedometer circuit in the 1996 Bronco?: Fuse 8 (15A, hot at all times) feeding circuit 54 LG/Y, and fuse 18 (10A, hot in run) feeding circuit 296 W/P. The fuse panel is detailed on pages 13-3 and 13-8.
What modules receive the vehicle speed signal from the PSOM?: The 679 GY/BK circuit from the PSOM feeds the Powertrain Control Module (PCM, connector C185 pin 58), the Speed Control Servo/Amplifier Assembly (connector C152 pin 3), and the Overhead Console (see page 102-1).
Where are the grounds for the VSS/PSOM circuit on the 1996 Bronco?: The 4WABS side grounds through circuit 57 BK to G100 (see page 10-11), and the PSOM/speed control side grounds through circuit 875 BK/LB to G200 (see grounds page 10-5).