F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Anti-Lock Electronic Control Module: Description and Operation
The anti-lock electronic control module continuously monitors rear wheel speed with a RABS sensor mounted in the rear axle housing for an impending
rear wheel lockup condition during braking. Anti-lock electronic control module will modulate hydraulic pressure to rear brake cylinders to inhibit rear
wheel lockup.