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⚠️ Optional electronic cluster with digital displays. No programming required; odometer stored in cluster. Standard models used analog mechanical cluster with no module.
Electronic Automatic Temperature Control (EATC)1.8 hr R&Rno coding1988-1991 models with automatic climate control option
📍 behind center instrument panel, integrated with HVAC control head
⚠️ Optional automatic climate control system. No programming; self-calibrates on power-up. Manual HVAC systems have no electronic module.
Anti-Lock Brake System Control Module (ABS)1.5 hr R&Rno coding1990-1991 models with optional ABS (Teves Mark IV system)
📍 left front frame rail near master cylinder
⚠️ Rear-wheel ABS only. Module is not programmable; fault code reading only via STAR tester or jumper wire self-test.
Electronic Engine Control (EEC)1.2 hr R&Rno coding1984-1991 models with EEC-IV system
📍 passenger side firewall, mounted on inner fender apron near brake master cylinder
⚠️ EEC-IV system introduced 1984. Calibration assembly (PROM) must match vehicle application; replacement requires correct part number for engine/transmission combination. Pre-1984 models have no electronic engine control.
Electronic Automatic Transmission Control (EATX)1.2 hr R&Rno coding1987-1991 models with AOD-E or E4OD transmission
📍 integrated with EEC module on passenger side firewall
⚠️ Transmission control integrated into EEC-IV processor on electronically-controlled automatic transmissions. E4OD (heavy-duty) introduced 1989.
Air Suspension Control Module (ASCM)1.0 hr R&Rno coding1988-1991 models with optional rear air suspension
📍 left rear quarter panel area, behind trim panel near air compressor
⚠️ Controls rear air springs and compressor for load-leveling. No programming required; operates autonomously based on height sensors.
Speed Control Amplifier (SCA)0.6 hr R&Rno codingwith factory cruise control option
📍 left front engine compartment, mounted on inner fender near battery
⚠️ Electronic cruise control amplifier. Simple component-level module with no programming or diagnostics 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 1979–1991 Ford Country Squire 5.8L 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.