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How-to

1993 Mercury Grand Marquis Alternator Voltage Regulator Removal

1993 Mercury Grand Marquis · Swap · Moderate

Documented by SuperMotors from Raymond Jones’s photos

This job removes the voltage regulator from a 1993 Mercury Grand Marquis alternator and separates the brush assembly from the back of it. The brushes are then held retracted with a paper clip while the regulator goes back in.

  1. Step 1

    Remove the four screws holding the voltage regulator, using a T20 Torx bit. The blue arrows in the photo mark the four screw locations.

    Remove the 4 screws that the blue arrows point too. (T20 torx bit) (1993 Mercury Grand Marquis) Side shot of the voltage regulator (1993 Mercury Grand Marquis)

  2. Step 2

    Note that the brushes push the regulator up once the screws are out. Lift the regulator straight out of the housing.

    When the screws are removed the voltage regulator will be pushed up by the brushes. (1993 Mercury Grand Marquis) Another shot with the screws removed. The regulator simply lifts out. (1993 Mercury Grand Marquis)

  3. Step 3

    Set the regulator on the bench and look at the back of it. Two screws, also T20 Torx, hold the brush assembly to the regulator.

    Voltage regulator. (The 2 screws in the picture hold the brush assembly to the regulator. T20 Torx bit) (1993 Mercury Grand Marquis) Side view....showing brush assembly (1993 Mercury Grand Marquis) This is the brush assembly bolted in place on the back of the voltage regulator (1993 Mercury Grand Marquis)

  4. Step 4

    Loosen and remove the two brush assembly screws. The brush assembly comes off the regulator with no further disassembly.

    Brush assembly screws loosened (1993 Mercury Grand Marquis) When you remove the 2 screws....the brush assembly simply comes off of the regulator (1993 Mercury Grand Marquis) Another shot of the brushes removed (1993 Mercury Grand Marquis)

  5. Step 5

    Before reinstalling the regulator, hold the brushes back inside the brush assembly. The owner used a bent paper clip through the hole to keep the brushes retracted while the regulator is put back.

    When you go to reinstall the regulator the brushes have to be held back into the housing. Use a paper clip to hold them in place. (1993 Mercury Grand Marquis) With the retaining screws tight, press the brushes into the housing. (1993 Mercury Grand Marquis) Here you can see that the brushes are held in place with the paper clip (1993 Mercury Grand Marquis) Another view of the brushes held in place (1993 Mercury Grand Marquis)

  6. Step 6

    Lay the regulator back into place with the brushes still retained. Line it up so the mounting screws will start.

    To install, simply lay the regulator into place. (1993 Mercury Grand Marquis) Ready to bolt in (1993 Mercury Grand Marquis)

  7. Step 7

    Tighten the mounting bolts, then pull the paper clip out. The brushes pop out of the housing audibly, which completes the job.

    Tighten the mounting bolts (1993 Mercury Grand Marquis) When the regulator is in place and screws tightened, pull the paper clip out. (1993 Mercury Grand Marquis) You will hear the brushes pop out of the housing.....and your done! (1993 Mercury Grand Marquis)

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