Power Transistor (Eclipse)

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1991 Plymouth Colt Vista, 1991 Plymouth Colt, 1991 Mitsubishi Pickup, 1991 Mitsubishi Montero, and 1991 Mitsubishi Mirage. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect power transistor connector. Using an analog ohmmeter, connect positive ohmmeter lead to terminal No. 7 and negative lead to terminal No. 3. See Fig 1 . Ensure there is no continuity.

Fig 1: Power Transistor Connector ID (Eclipse)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Using a 1.5-volt dry cell battery, connect positive end of 1.5-volt battery to power transistor terminal No. 6 and negative end to terminal No. 3. Ohmmeter should now read continuity between power transistor terminals No. 7 and No. 3.
Connect positive end of 1.5-volt battery to power transistor terminal No. 2 and negative end to terminal No. 3. Connect positive ohmmeter lead to terminal No. 1 and negative lead to terminal No. 3. Ohmmeter should read continuity. Replace power transistor if it does not test as described.