Mercury Villager 2000-2002

Power Transistors


The power transistor is located between the ignition coil and the distributor on 1993-98 3.0L engine models. On 1999-00 3.3L engine models, the power transistor is located inside of the distributor, and cannot be replaced separately.

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Fig. Power transistor location-1993-98 3.0L engines

Removal & Installation

3.3L Engines

The power transistor is part of the distributor assembly, and must be replaced as a unit. Please refer to Distributor, Removal and Installation for the procedure.


The use of a digital volt ohmmeter (DVOM) is required for the following power transistor tests. If using a DVOM with a diode or transistor test function, follow the meter manufacturer-s instructions for testing transistors.

The following tests only check for an internally shorted transistor and will not detect if the transistor is open or weak.

3.3L Engines
  1. Disconnect the negative battery cable.
  3. Disconnect the two-wire ignition coil harness connector from the distributor electrical connector.
  5. Disconnect the six-wire distributor harness connector from the distributor.
  7. Connect the digital ohmmeter leads to pin 2 of the six-pin distributor terminal, and to the green wire (pin 2) terminal of the two-wire distributor electrical connector. If the resistance is 0 ohms, replace the distributor.

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    Fig. To check the power transistor, disconnect the six-wire distributor harness connector