1987 Ford Aerostar Van Cargo, 2.3 A, AutomaticFACTORY OEM SERVICE PROCEDURE

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 1 and 2. Engine RPM should be indicated. Next, turn ignition on. Connect positive lead of voltmeter to terminal 1 and negative lead to terminal 8. Battery voltage should be indicated.
  3. Turn ignition off. Connect one lead of ohmmeter to terminal 4 and other lead to terminal 6. Ohmmeter should read continuity. Repeat same test between terminals 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.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.