Rainier 2WD V8-5.3L VIN P (2004)
Horn: Symptom Related Diagnostic Procedures
A Symptoms - Horns
SYMPTOMS
IMPORTANT: The following steps must be completed before using the symptom tables:
1. Perform Diagnostic System Check - Horns before using the symptom tables in order to verify that all of the following are true:
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There are no DTCs set.
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The control module(s) can communicate via the serial data link. See: Initial Inspection and Diagnostic Overview/Diagnostic System Check -
Horns
2. Review the system operation in order to familiarize yourself with the system functions. Refer to Keyless Entry System Description and Operation
in Keyless Entry.
Visual/Physical Inspection
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Inspect for aftermarket devices which could affect the operation of the horn system.
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Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
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Perform the following if a horn buzzes or has a harsh tone:
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Inspect for debris in the joint where the horn fastens to the vehicle.
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Test the torque of the horn mounting hardware. The horn mounting hardware should be tightened to a torque of 10 N.m (7 lb ft).
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
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Horns Always On
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Horns Inoperative
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Horns - Poor Tone