From: | Dave Hennessey | e-mail: | dave-A-toyhouse.org |
Subject: | RE: RE: RE: RE: RE: RE: Horn Problem | Date: | Fri Jun 3 11:58:22 2016 |
Response to: | 21285 |
Barry, Mutt is always right about these things. Sorry I gave you some mis-information. As Rod Powell (a Topper guy) explained to me, the DC horns have a set of contacts in them. When the diaphram moves one way, it disconnects itself, and moves back the other way. The AC horn moves back and forth as the current reverses. These Hella horns were also used on Toppers, so at the swap meets, pay attention to piles of Topper parts! The Topper club has some good photos: http://www.harleytopperclub.com/horn.htm Dave ----- ORIGINAL MESSAGE FOLLOWS ----- Thanks Mutt for the diagnosis! I am going to try the diode if practical. The horn I am using is a new generic one for motorcycles and it makes sense that it is only DC. I wonder if the two "dead" Hella horns that I tested with my bench top 6-volt battery really aren't dead! Very interesting. ----- ORIGINAL MESSAGE FOLLOWS ----- If you're not going original put a low voltage diode in the circuit and the horn might work. ----- ORIGINAL MESSAGE FOLLOWS ----- Your magneto puts out AC current, the horn ya have uses DC current. Won't ever work. ----- ORIGINAL MESSAGE FOLLOWS ----- The horn works really strong on just a 6-volt battery. I know my headlights work but haven't paid attention as to how bright or whether they dim when horn button is pressed. If so what would that mean? Thanks for your help. ----- ORIGINAL MESSAGE FOLLOWS ----- Does the horn have an adjusting screw? You should use a 6 volt battery and see how the horn beeps. If it doesn't beep well, turn the adjusting screw a little in either direction, and see if it improves. If it doesn't beep well on a battery, it won't beep well on the bike. However, sometimes it needs minor re- adjustment when it's on the bike. ----- Looking at the wiring diagram, it appears that the magneto lighting coil runs both the headlight and the horn. How bright is the headlight? What happens when you have the headlight on and press the horn button? ----- ORIGINAL MESSAGE FOLLOWS ----- I am using a new 6-volt replacement horn for my Super 10 but can't get a loud sound. I have a magneto and can get a little beep if the engine is reved up. I have checked the horn button circuit and it is fine. All of my wiring is also brand new. My ignition works fine. Does anyone have any suggestions? Thanks. |
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