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Old 04-11-2021, 07:49 PM   #1
KNicholas2
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Default Horn problems

The horn on my "31 coupe does not work.
I checked - it is receiving 6 volts of power when the horn button is pushed. I can hear a subtle "click" but the horn motor will not rotate.
If I manually rotate the shaft is seems to move easily.

Suggestions?
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Old 04-11-2021, 08:53 PM   #2
700rpm
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Default Re: Horn problems

Back off the adjusting screw a few notches. If it then turns, close it down till you get the sound you want. See that the commutatiors are clean and shiny, and that the brushes are making good contact. Also make sure the felt on the ends of the armature are lightly oiled.
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Old 04-11-2021, 09:21 PM   #3
Bob C
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Default Re: Horn problems

The horn always has 6 volt to it, the ground is through the horn button on the steering wheel.
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Old 04-12-2021, 02:09 AM   #4
28Danby
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Default Re: Horn problems

I've had a similar problem. Turned out the diaphram was dickered. Rebuilt the horn, was cheap and easy to do and sounds great.
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Old 04-13-2021, 11:54 AM   #5
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Default Re: Horn problems

Back off the adjustment screw until the motor spins freely. No sound. Assuming it will run when the button is pushed, Let the motor spin for about 15 or 20 seconds. This may loosen things up.
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Old 04-13-2021, 12:18 PM   #6
Big hammer
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Default Re: Horn problems

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And a few drops of a light weight oil on the felts and bushings, might be another good use for MMO !
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Old 04-13-2021, 04:33 PM   #7
Badpuppy
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Default Re: Horn problems

Horn button contact may be crusty. Connect a solid ground to the horn button side of the motor (the side that doesn't burn your fingers). If it spins, you need to clean up the button contact.
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Old 04-13-2021, 04:35 PM   #8
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Old 04-14-2021, 03:39 PM   #9
Ivan in southeast va.
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Default Re: Horn problems

I would check the commutator and see if it is dirty. I take a small piece of a scotch-brite pad with a little wd-40 on it and spin the motor by hand while cleaning the commutator.
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Old 04-14-2021, 05:35 PM   #10
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Default Re: Horn problems

Pull the cover off and run jumper wires directly from the battery. If it sounds good then you're troubles are elsewhere.
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