Fitment notes: Heavy duty battery recommended for 351ci V8; standard equipment for this engine size
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Every control module on the 1984-1989 Ford F-100 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Anti-Lock Brake System Control Module (ABS)1.5 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Frame rail or under driver seat area
🔧 Scan tool or self-bleed procedure
⚠️ Rear-wheel ABS (RABS) optional on later years (1987-1989). Simple system requiring brake bleeding and sensor relearn after replacement.
🔧 Rotunda NGS Tester or PROM/calibration assembly swap
⚠️ EEC-IV standard on fuel-injected models (CFI and later EFI). Calibration via replaceable chip/calibration assembly. KOEO/KOER self-test diagnostics. Some base models may still use carbureted engines with Duraspark only.
⚠️ Used on carbureted base models without EEC-IV. Non-programmable solid-state ignition 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 1985 Ford F-100 351ci V8 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.