F 550 4WD Super Duty V10-6.8L VIN S (2000)
Speedometer Head: Description and Operation
Speedometer
The electronic speedometer (17255) receives a speed signal from 4-Wheel Anti-Lock Brake System (4WABS) module (if equipped with 4WABS) or the
Generic Electronic Module (GEM)/Central Timer Module (CTM), if equipped with Rear Anti-Lock Brake System (RABS).
