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Horn Relay: Inspection

  1. INSPECT FUSE (HORN) 
    1. Check the resistance of the HORN fuse.

      Standard: Below 1 Ω 

  2. INSPECT HORN RELAY 
    1. Remove the engine room R/B and J/B (horn relay).
    2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Locating Horn Relay Terminal
      G04981015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      HORN RELAY

      Tester Connection Condition Specified Condition
      1G-1 - 1B-6 Always 10 kΩ or higher
      1G-1 - 1B-6 When battery voltage is applied to terminals 1G-1 and 1D-10 Below 1 Ω
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