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Horn only works when running

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Old Dec 2, 2022 | 09:43 AM
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Default Horn only works when running
Hi Forum!
I have a 1992 Dyna FXDC - pretty standard engine/wiring set up.
This might be a quick one and perhaps too easy for you guys. I'm not brilliant on electrics and before I start tearing things apart I thought I'd ask...
What could lead to my horn only sounding when I am riding?
When I'm in neutral and engine running, I get no sound, just a click. Once I get moving the horn sounds just fine.
Thanks!
 
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Old Dec 2, 2022 | 09:59 AM
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at Higher RPM it prolly works... Battery/Charging system...or???? beats me.
 
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Old Dec 2, 2022 | 10:03 AM
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Electro mechanical device out of adjustment but vibration makes it work.
 
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Old Dec 2, 2022 | 10:08 AM
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Thanks Racepres, all the other electrics work just fine so not sure about this.
 
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Old Dec 2, 2022 | 10:09 AM
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Thanks Andy, not sure how to test this theory or fix it.
 
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Old Dec 2, 2022 | 10:12 AM
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On some old stuff there will be a screw in the middle that can be turned in or out to change the sound.

If you tap it or hit it whilst the button is pressed does it respond?
 
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Old Dec 2, 2022 | 10:25 AM
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I'll check it out, its one of these types of horns, dont think it has a screw in the middle on these.
 
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Old Dec 2, 2022 | 05:30 PM
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Likely a bad connection at the horn. Intermittent ground or power. If its still sounding some of the time, the horn is fine, so about all that's left are the connections. Pull them off, spray with some contact cleaner and then using a pair of needle nose pliers, close up the connector so it applies more pressure and makes better contact with the male connector on the horn.
 
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Old Dec 2, 2022 | 08:57 PM
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I'd look at the battery first.
 
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Old Dec 3, 2022 | 11:08 PM
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Thanks Cycleman and Omaha. I'll check the battery and the connections.
 
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