Fitment notes: 351ci V8 requires high CCA rating; standard top post configuration
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Control Modules — 1986 Ford F-150
Every control module on the 1981-1986 Ford F-150 — where it lives, replacement time, and what it takes to program a replacement.
Electronic Instrument Cluster (EIC)1.5 hr R&Rno codingDigital/electronic cluster option only
📍 Integrated into instrument panel behind gauge face
⚠️ Analog clusters are non-electronic; electronic version rare on F-150 in this generation
Electronic Engine Control (EEC-III)1.2 hr R&Rno codingFuel-injected engines only (302 EFI, 351 EFI)
📍 Behind right side of instrument panel, above transmission tunnel
⚠️ Calibration assembly (PROM) is vehicle-specific and must match application; EEC-III used 1981-1983, EEC-IV from 1984+; carbureted engines have no module
Speed Control Amplifier (SCA)0.5 hr R&Rno codingWith factory cruise control
📍 Engine compartment, mounted on left inner fender or firewall
⚠️ Electromechanical servo amplifier; not a programmable module
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 1986 Ford F-150 351ci V8 and can vary by trim.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.