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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis >> Electrical >> Horns >> Horn System >> Horn Switch >> Inspection >> Check Horn Switch

Check Horn Switch

CAUTION: Before handling the airbag system components, refer to "CAUTION" of "General Description" in "AIRBAG SYSTEM". Refer to AIRBAG SYSTEM>GENERAL DESCRIPTION>CAUTION .
  1. Turn the ignition switch to OFF.
  2. Disconnect the ground cable from battery and wait for at least 60 seconds before starting work. Refer to NOTE>NOTE>BATTERY .
    NOTE: For model with battery sensor, disconnect the ground terminal from battery sensor.
  3. Remove the driver's airbag module. Refer to AIRBAG SYSTEM>DRIVER'S AIRBAG MODULE>REMOVAL .
  4. Check that the horn switch connector is connected properly.
  5. Measure the resistance between connectors.

    Preparation tool: 

    Circuit tester

    G13648990Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Inspection conditions Standard
    Horn switch terminal - ground terminal Always Less than 1 Ω
  6. Replace the driver's airbag module if the inspection result is not within the standard value.