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HOMESERVICE MANUALSFORD1988AEROSTAR VAN PASSENGER, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMDECELERATION CONTROL SYSTEMTESTINGELECTRONIC GOVERNOR MODULE CHECK
1988 Ford Aerostar Van Passenger, Automatic

Electronic Governor Module Check

1988 Ford Aerostar Van Passenger, AutomaticSECTION Electronic Governor Module Check
  1. Check harness as follows: number harness terminals from 1 to 8, with No. 1 being nearest the locator key.
  2. With engine running, connect tachometer to terminals No. 1 and 2. Engine RPM should be indicated. Next, turn ignition on. Connect positive lead of voltmeter to terminal No. 1 and negative lead to terminal No. 8. Battery voltage should be indicated.
  3. Turn ignition off. Connect one lead of ohmmeter to terminal No. 4 and other lead to terminal No. 6. Ohmmeter should read continuity. Repeat same test between terminals No. 5 and 7. Continuity should again be indicated.
  4. If any terminals fail any tests, repair wiring harness as required. If harness meets all specifications, replace electronic governor module.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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