Service Procedures — Ford F-150 1987-1991
Technical Reference
Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.
Service Procedures
- Ford RABS rear antilock brake system troubleshooting flowchart; routes from yellow RABS / red brake warning bulb behavior to Tests A through F using the flashout diagnostic code.
- Service tech note for Dorman window lift motors 742-250/742-251 with installation instructions and photos showing how to elongate the regulator hole.
- Service manual component-location table and troubleshooting hints for the diesel glow plug system: cold advance/idle solenoids and engine temp switch in injection pump, controller on RH fender, temp switch opens at 62C.
- Service manual text explaining diesel glow plug control operation: glow plug controller heats plugs 0-15 seconds based on coolant temp, with after-glow timer cycling up to two minutes.
- Annotated diagram of a door-lock actuator rod marking the guide rod, break point, and where the key pushes.