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Test No. 12: Door Courtesy Switch Circuit: Testing

  1. Check operation of door courtesy switch for appropriate door. See appropriate ANTI-THEFT SYSTEMS article. If door courtesy switch operates properly, go to next step. If door courtesy switch is defective, replace door courtesy switch.
  2. Check for faulty connectors and wiring between door courtesy switch, courtesy lights and body Electronic Control Unit (ECU). See WIRING DIAGRAMS .
  3. Repair connectors or wiring as necessary. If connectors and wiring are okay, go to next test listed. See appropriate TROUBLE SHOOTING SYMPTOMS table under TROUBLE SHOOTING.