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Issue with horn, turn signals, and brake light 2012 Heritage

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Old Mar 29, 2023 | 10:33 AM
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Default Issue with horn, turn signals, and brake light 2012 Heritage

Sop I am helping clean up this bike for a widow from my church. Been working on Harleys for over 30 years. This has me stumped.

After sitting over night several times now and a fully charged brand new battery turn on the bike and the horn is blasting. Turn it off and back on it stops. Then just a single horn chirp. Crazy.

Left turn signal will not work nor the Brake light. Hazards do work.

Any thoughts? Maybe a module or circuit board or some sort in these new computerized bikes?
 
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Old Mar 29, 2023 | 10:44 AM
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All those components are controlled by the Body Control Module.

Unplug the Body Control Module, inspect the terminals, clean them with contact cleaner (connector side only, not BCM side).

Does the bike have a security system, if so replace the battery in the FOB (if it has a fob).

Be suspicious of the battery, charge it and take it to an auto parts store, they will load test it for free.

Check for codes.

Wiring diagrams for 2012 models

 
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Old Mar 29, 2023 | 11:30 AM
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Thank you Dan. I will check it out. Can you tell me where it is located. I found the ECM on the fender behind the battery. Is it under the battery?
 
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Old Mar 29, 2023 | 11:59 AM
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Okay I found it in front of the back tire. Looks like I need to loosen the Splash pan to get to it.
 
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Old Mar 29, 2023 | 12:27 PM
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Ok so I have access to the BCM. When you clean the terminals connecter side only what are you referring to? There are only two connections. The big block with the swivel lock that obviously goes into the harness and a single red wire that is power.

 
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Old Mar 29, 2023 | 12:32 PM
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Don`t spray any contact cleaner on the BCM itself.
 
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Old Mar 29, 2023 | 12:44 PM
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i know a bifer he is from south fl now in central fl. are you him??
 
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Old Mar 29, 2023 | 02:11 PM
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I only know of one Bifer and yes that is me. Grew up in Deerfield, now in Ocala.

How do I know you Dan?
 
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Old Mar 29, 2023 | 02:39 PM
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Got some things figured out. Have another question.
 
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Old Mar 29, 2023 | 03:09 PM
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im
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Originally Posted by Steve Bifer Kline
Sop I am helping clean up this bike for a widow from my church. Been working on Harleys for over 30 years. This has me stumped.

After sitting over night several times now and a fully charged brand new battery turn on the bike and the horn is blasting. Turn it off and back on it stops. Then just a single horn chirp. Crazy.

Left turn signal will not work nor the Brake light. Hazards do work.

Any thoughts? Maybe a module or circuit board or some sort in these new computerized bikes?
When you write single horn chirp? Is it the actual factory HORN or an alarm siren chirp.
*Reason: some bikes had a rechargeable battery as part of alarm siren.
When the little 9v or whatever battery in the siren went bad then the bike would have weird security problems.
From a distance it reads like you might have a security system.
Can you deactivate security?
Do you have the alarm key fob ?
Does key fob have a new battery with protective tape removed from battery in key fob?
 
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