Rear Power Transistor Test

Rear Power Transistor Test

1. Disconnect the 4P connector from the rear power transistor.




2. Measure the resistance between the No. 1 and No. 2 terminals of the rear power transistor. It should be approximately 1.4 - 1.5 k Ohms.
- If the resistance is within the specifications, go to step 3.
- If the resistance is not within the specifications, replace the rear power transistor.




3. Carefully release the lock tab on the No. 4 terminal (WHT/RED) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
4. Reconnect the 4P connector to the rear power transistor:
5. Supply 12 volts to the No. 4 cavity with a jumper wire.
6. Turn the ignition switch ON (II), and check that the rear blower motor runs.
- If the rear blower motor does not run, replace the rear power transistor.
- If the rear blower motor runs, the rear power transistor is OK.