1990 Ford Bronco II RWD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE

Test N: Step 11

11)Β Check ECA & Harness ConnectorsΒ  Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect connector for damaged pins, corrosion or loose wires. If connector is damaged, repair as necessary, clear codes and repeat QUICK TEST. If connector is okay, perform the following procedure based on the Continuous Memory Code displayed:

  • Code 14: Unable to duplicate erratic ignition fault in EEC system. Remove breakout box, reconnect all components. Diagnosis DIS ignition system.
  • Code 18: Replace ECA, remove breakout box and reconnect all components. Start and run engine for about one minute and rerun QUICK TEST.
  • Codes 28 & 48: Remove breakout box and reconnect all components. Diagnose ignition system. If ignition system is okay, replace the ECA.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.