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Home >> Lexus >> 2007 >> SC 430 >> Repair and Diagnosis >> Electrical >> Horns >> Horn >> Horn System >> Problem Symptoms Table

Problem Symptoms Table

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Horn system 

SYSTEM REFERENCE

Symptom Suspected area See page
Horn does not sound 1. HORN fuse HORN SYSTEM 
2. SECURITY fuse HORN SYSTEM 
3. HORN relay HORN RELAY 
4. High pitched horn REMOVAL 
5. Low pitched horn REMOVAL 
6. Front light ECU (Front controller) -
7. Driver side ECU -
8. Steering pad assembly (Combination switch) -
9. Wire harness -