Front Power Transistor Test

Front Power Transistor Test

1. Remove the passenger's dashboard undercover Passenger's Dashboard Undercover Removal/Installation.

2. Disconnect the 4P connector from the front power transistor.

3. Measure the resistance between front power transistor terminals No. 3 and No. 4. It should be about 1.5 kOhms.

- If the resistance is within the specifications, go to step 4.
- If the resistance is not within the specifications, replace the front power transistor.
NOTE: Also check the front blower motor. Front power transistor failure can be caused by a defective front blower motor.





4. Carefully release the lock tab on terminal No. 1 (BLU/YEL) (A) in the 4P connector, then remove the terminal and insulate it from body ground.





5. Reconnect the 4P connector to the front power transistor.

6. Make sure the BLU/YEL wire is completely isolated, then supply 12 volts to cavity No. 1 with a jumper wire.

7. Turn the ignition switch to ON (II), and check that the front blower motor runs.

- If the front blower motor does not run, replace the front power transistor.
- If the front blower motor runs, the front power transistor is OK.