E 250 Van V8-7.3L DSL Turbo VIN F (1995)
Brake Proportioning/Combination Valve: Testing and Inspection
If there is a brake system concern such as premature rear brake lockup, that cannot be attributed to the Rear Antilock Brake System (RABS), the cause
may be a malfunctioning brake master cylinder fluid control valve.
Check the brake master cylinder fluid control valve by substituting the suspected bad valve with a known good one. If the condition persists, recheck the
RABS.
