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Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check horn. 
    1. NG: Replace horn. 
    2. OK: Go to next step 
  2. Check horn switch. 
    1. NG: Replace horn switch. 
    2. OK: Go to next step 
  3. Check wire harness and connector between horn and body ECU, and body ECU and horn switch (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG: Repair or replace wire harness and connector. 
    2. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE   . 
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