2001 Mercury Villager BaseFACTORY OEM SERVICE PROCEDURE

Ground Circuits

  1. Turn ignition off. Locate PCM behind top right side of instrument panel, behind glove compartment. Using a DVOM, check continuity between ground and appropriate PCM connector terminals. See IDENTIFYING PCM GROUND TERMINALS  table. See Figure. If continuity does not exist, repair open ground circuit as necessary. If continuity exists, go to next step.
  2. Touch negative lead of voltmeter to a good ground. With vehicle running, backprobe positive lead of voltmeter to each ground terminal. Voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corrosion or loose connection on ground lead.
    IDENTIFYING PCM GROUND TERMINALS

    PCM Terminal No. Wire Color
    10 Black
    19 Black
    39 Black/Red
    45 Black/Red
    96 Black
    104 Black
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:

  • • 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.

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