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Test No. 3

  1. Check Voltage At Anti-Theft System Horn

    Ensure ignition is off. Disconnect electrical connector at anti-theft system horn. See Figure. It may be necessary to remove anti-theft system horn for access to electrical connector.
  2. Using voltmeter, check voltage between ground and terminal No. 1 (White wire) on electrical connector for anti-theft system horn. Voltage should be 10-14 volts. If voltage is okay, go to next step. If voltage is not within specification, check and repair defective connectors or White wire between HORN fuse and anti-theft system horn. See WIRING DIAGRAMS . HORN fuse is located in engine compartment fuse/relay box near battery. See Figure.

  3. Check Anti-Theft System Horn

    Check anti-theft system horn operation. See ANTI-THEFT SYSTEM HORN  under COMPONENT TESTS. If anti-theft system horn operates, go to next step. Replace anti-theft system horn if horn fails to operate.

  4. Check Anti-Theft System Horn Wiring

    Check for defective connectors and White/Blue wire between anti-theft system horn and anti-theft system Electronic Control Unit (ECU). See WIRING DIAGRAMS . Anti-theft system ECU is located near passenger's side of instrument panel, behind glove box, just above kick panel and uses a 12-pin electrical connector and a 22-pin electrical connector. See Figure.
  5. If wiring and connectors are okay, replace anti-theft system ECU. See ANTI-THEFT SYSTEM ECU  under REMOVAL & INSTALLATION. If connectors or wiring is defective, repair as necessary.
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