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08 flhtcu buzzes when ignition turned on?

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Old Nov 14, 2019 | 02:31 PM
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Default 08 flhtcu buzzes when ignition turned on?
Does anyone elses bike make a buzzing sound when the ignition is turned to the on position? My bike buzzes from the fairing....strange. I'm going to pull it apart soon, once my head unit arrives
 
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Old Nov 14, 2019 | 04:42 PM
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You might be hearing the fuel pump.
 
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Old Nov 14, 2019 | 04:57 PM
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Nope, fuel pump primes and goes off once the kill switch is set to run. This buzz is happens when the kill switch is off and the ignition is turned on.
 
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Old Nov 14, 2019 | 06:45 PM
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Relays can buzz when they are on the way out.
 
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Old Nov 14, 2019 | 06:52 PM
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Does it have a LED headlight bulb with a fan on it?
 
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Old Nov 14, 2019 | 07:39 PM
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Originally Posted by exsporty
Relays can buzz when they are on the way out.
This is what I am afraid of...
 
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Old Nov 14, 2019 | 07:39 PM
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Originally Posted by Indawynd
Does it have a LED headlight bulb with a fan on it?
I just installed LEDs, but no fan...

 
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Old Nov 15, 2019 | 09:15 AM
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turn on the power and start pulling fuses to at least isolate the circuit the "buzzer" is on. Since the noise is new and so is the headlight, I would start with that circuit.
 
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Old Nov 15, 2019 | 11:33 AM
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Originally Posted by btsom
turn on the power and start pulling fuses to at least isolate the circuit the "buzzer" is on. Since the noise is new and so is the headlight, I would start with that circuit.
Good idea, thanks.
 
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Old Nov 15, 2019 | 11:37 AM
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Is it like a buzz through the stereo from ground loop interference? Is it stock radio or aftermarket? If aftermarket is everything grounded to the battery?
 
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