Fitment notes: Standard top post battery; 4WD models may require higher CCA in cold climates
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Every control module on the 1987-1991 Ford F-150 — where it lives, replacement time, and what it takes to program a replacement.
Anti-Lock Brake System Control Module (ABS)1.5 hr R&Rno codingWith factory ABS (rear-wheel ABS, RABS)
📍 Left front frame rail, near master cylinder
⚠️ Rear-wheel ABS only in this generation; module is diagnostic-only, no programming capability
Electronic Instrument Cluster (EIC)1.5 hr R&Rno codingElectronic/digital cluster option only
📍 Integrated into instrument panel behind gauge face
⚠️ Most F-150s used analog clusters; electronic version uncommon
Air Bag Diagnostic Monitor (ABDM)1.0 hr R&Rno codingwith driver airbag option (1990-1991)
📍 under center of instrument panel, above transmission tunnel
⚠️ Driver airbag became available 1990 model year. Module is non-programmable but requires crash data clear after deployment.
Electronic Engine Control (EEC-IV)1.0 hr R&Rno coding
📍 Behind right side of instrument panel, above transmission tunnel
⚠️ Calibration assembly (PROM or EEPROM) must match vehicle application; all engines use EEC-IV by 1988; replacement requires correct part number for engine/transmission/emissions
Electronic Automatic Transmission Control (EATX)1.0 hr R&Rno codingE4OD automatic transmission only (1989+)
📍 Behind right side of instrument panel, integrated with EEC-IV processor
⚠️ E4OD transmission control is integrated into EEC-IV module; earlier automatics are hydraulic-only
Speed Control Amplifier (SCA)0.5 hr R&Rno codingWith factory cruise control
📍 Engine compartment, left inner fender or firewall
⚠️ Electromechanical servo amplifier; not programmable
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1987 Ford F-150 4.9L I6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.