Ford RABS Rear Anti-Lock Brake Sensor to PSOM, PCM & Speed Control Block Diagram

This document is a simple functional block diagram showing the signal flow of the Rear Anti-Lock Brake Sensor (RABS) circuit in a Ford vehicle. The diagram depicts the Rear Antilock Brake Sensor (RABS), drawn with positive (+) and negative (−) terminals, feeding its signal to two components: the Programmable Speedometer/Odometer Module (PSOM) and the Rear Anti-Lock Brake Module. The PSOM, in turn, processes the sensor signal and outputs a conditioned vehicle speed signal (shown with a + terminal and a chassis ground reference) to two downstream modules: the Powertrain Control Module (PCM) and the Speed Control Module (cruise control). A reader can learn from this diagram how the rear axle speed sensor signal is shared among the ABS, speedometer, engine management, and cruise control systems, and that the PSOM acts as the intermediary that converts the raw RABS sensor signal for use by the PCM and Speed Control Module. The diagram carries the Ford illustration reference number A15929-C. No wire colors, connector pin numbers, fuse ratings, or specific model-year applicability are given in the image; it is a conceptual signal-routing overview rather than a detailed wiring schematic.