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Horn Relay

  1. Ensure ignition is off. Remove horn relay. Horn relay is located in fuse/relay box at driver's side front corner of engine compartment. See Figure.
  2. Note identification of electrical terminals on horn relay. See Fig 1. Using ohmmeter, check that no continuity exists between terminals No. 3 and 5 on horn relay. Check that continuity exists between terminals No. 1 and 2 on horn relay.
  3. Using jumper wires, apply battery voltage and ground to terminals No. 1 and 2 on horn relay. Check that continuity now exists between terminals No. 3 and 5 on horn relay. See Fig 1. Replace horn relay if defective.
    Fig 1: Identifying Electrical Terminals On Horn Relay
    G00018637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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