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Power Transistor Test

  1. Remove the passenger's dashboard under cover (see PASSENGER'S DASHBOARD UNDER COVER REMOVAL/INSTALLATION ).
  2. Disconnect the 4P connector from the power transistor.
  3. Measure the resistance between the No. 3 and No. 4 terminals of the power transistor. It should be about 1.5 kΩ.
    • If the resistance is within the specifications, go to step 4.
    • If the resistance is not within the specifications, replace the power transistor.
    Fig 1: Measuring Resistance Between No. 3 And 4 Terminals Of Power Transistor
    G03706340Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Carefully release the lock tab on the No. 1 terminal (BLU/YEL) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
    Fig 2: Releasing Lock Tab On No. 1 Terminal (BLU/YEL) In 4P Connector
    G03706341Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Reconnect the 4P connector to the power transistor.
  6. Make sure the BLU/YEL wire is completely isolated, then supply 12 volts to the No. 1 cavity with a jumper wire.
  7. Turn the ignition switch ON (II), and check that the blower motor runs.
    • If the blower motor does not run, replace the power transistor.
    • If the blower motor runs, the power transistor is OK.
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