Horn Circuit Malfunction
What does B1113 mean?
The B1113 code means the vehicle's onboard diagnostic system has detected: Horn Circuit Malfunction. This is a moderate severity code.
Common Symptoms
- Horn does not sound when pressed
- Horn sounds weak or muffled
- Horn sounds continuously without pressing
- Horn only works intermittently
- Horn sounds different than normal
Probable Causes (Ranked by Likelihood)
- Failed horn assembly Very High
- Faulty horn relay High
- Corroded horn connector or ground Moderate
- Defective clock spring or horn switch Moderate
- Blown horn fuse Low
Step-by-Step Diagnostic Procedure
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Check horn fuse in fuse box
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Test horn relay by swapping with identical relay
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Apply direct power to horn to test function
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Check horn connector and ground for corrosion
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Test clock spring and horn button continuity
Frequently Asked Questions
Is a working horn required by law?
Yes. All states require a functioning horn as part of the vehicle safety equipment. A non-working horn can result in a traffic citation and will fail a safety inspection.
What is a clock spring?
The clock spring is a coiled ribbon cable inside the steering column that maintains electrical connections to the horn, airbag, and steering wheel controls as the wheel turns.
Why does my horn sound different?
Most vehicles have two horn units that sound together to create the full tone. If one fails, the remaining horn will sound weaker or at a different pitch than normal.