📍 Integrated into instrument panel behind gauge face
⚠️ Digital/electronic display option; most F-250s used analog mechanical clusters with no module.
Electronic Engine Control (EEC)1.2 hr R&Rno codingGasoline engines with EFI (EEC-III 1981-1983, EEC-IV 1984-1986)
📍 Behind battery on driver-side inner fender apron
⚠️ Calibration assembly (PROM) must match vehicle application; non-programmable. 6.9L diesel and carbureted engines have no EEC module.
Speed Control Amplifier (SCA)0.6 hr R&Rno codingWith factory cruise control
📍 Under hood on driver-side firewall near brake booster
⚠️ Electromechanical servo amplifier; no programming capability.
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-250 300ci I6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.