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Home >> Toyota >> 2004 >> Tundra Base, Standard >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Systems - Diagnostics >> Circuit Inspection >> Daytime Running Light Relay Circuit >> Inspection Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Inspection Procedure

  1. Check DRL NO. 4 relay, HEAD relay and DIMMER relay (See  BODY ELECTRICAL SYSTEMS (DOUBLE CAB) - TROUBLESHOOTING  ). 
    1. NG: Replace DRL NO. 4 relay, HEAD relay and DIMMER relay. 
    2. OK: Go to next step 
  2. Check wire harness and connector between DRL relay and body ECU, and battery and DRL relay (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 (See  PROBLEM SYMPTOMS TABLE  ). 
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