1994 Ford Bronco/F-Series Instrument Cluster PSOM Wiring Diagram - EVTM 60-7

This is page 60-7 from the 1994 Ford Bronco/F-Series Electrical and Vacuum Troubleshooting Manual (EVTM), showing the wiring diagram for the standard instrument cluster's Programmable Speedometer/Odometer Module (PSOM). The PSOM receives battery power from fuse 8 (15A, hot at all times) via circuit 54 LG/Y through splice S214, and run power from fuse 18 (10A, hot in run) via circuit 296 W/P through splice S242. A test input on pin 9 (circuit 567 LB/Y through connector C252) connects to the PSOM programming enable connector via C232. The vehicle speed sensor connects via circuits 523 R/PK, 519 LG/BK, and 679 GY/BK, with Bronco-only alternate circuits 491 O/LB and 530 LG/Y. Ground is through circuit 676 BK/W to splice S216, then 570 BK/W to ground G200. A note explains that the solid-state module's microprocessor converts the ABS sensor input to a standard 8000 pulses-per-mile speed signal fed to the PCM and Speed Control Servo/Amplifier. A connector reference list maps C177 (cell 97), C268 (49), C269 (149), and C1027 (27, 28). Cross-references point to power distribution (pages 13-15, 13-17), fuse panel (13-3, 13-9, 13-13), grounds (10-10), and vehicle speed sensor (64-1, 64-2).