TOPIC: horn

horn 12 May 2017 06:05 #1

gocommando
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so last month after brief winter nap my 75 fired right up. took it for inspection stickah - everything worked but horn-just a mild chirp. was given a sticker after promising to fix. searched through spare parts bin and found a working donor with 2 terminals. was able to disconnect original wires (striped purple and red I think). I've replaced horns before-disconnect ,unbolt...bolt, reconnect - but concerned about positive ground set up - don't want to fry any wires. can i just hook up original wires ? also can i mount new horn directly to steel frame without issues? advice please.

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horn 12 May 2017 09:14 #2

dynodave Offline Moderator dynodave Posts: 450 Thank you received: 263	Horns are not polarity sensitive. The correct and easiest way is to pull the rear fender. It is actually the quickest and least stressful. Most horns can not be rigid mounted successfully.The horn MUST use the (flexible) mounting bar or it will not oscillate (beep) strongly. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
	Please Log in to join the conversation. Dave Comeau atlanticgreen.com/contact.htm

horn 12 May 2017 09:23 #3

gocommando
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dave i should have been clearer. the issue I was concerned with is more electrical in nature. does the horn need to be insulated from the steel frame so that it doesn't beep when power is on. years ago i replaced pair of horns - i had one set that when mounted in stock location on frame beeped when ignition was on. another set had no issues with mounting to frame. and i am using a more forward and accessible location on my Norton. thanks

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horn 12 May 2017 10:43 #4

dynodave
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An electromagnetic horn is not polarity sensitive. an air horn compressor with motor very likely is...
If you're moving the horn then your new modified wiring needs to be correct. If you don't know what is the operating principal of the horn and wiring is,.. then you need educated help or else trial and error until you luck out upon it.
You can call or come down if you want, sorry but it's more than I want to type

could be a tech session?

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Dave Comeau
atlanticgreen.com/contact.htm

horn 12 May 2017 13:38 #5

gocommando Topic Author Offline Senior Member Posts: 42 Thank you received: 12	thanks...as stated did horns in past but on neg ground systems-didn't know if it made a difference. sure i'll get it done. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
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horn 24 May 2017 11:41 #6

gocommando
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so i found a small horn...2.5" 12v 2 terminal 1.5 amp with a simple steel strap bracket. put a small bend in bracket and attached to frame behind the left side cover. i wrapped frame with piece of bicycle inner tube and used a hose clamp to attach bracket and horn. used existing stock wires- only worked one way so not sure if this is what Dave meant by polarity sensitive but beeps fine and quicker fix than diving into the original location.

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