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electrical, hella supertones, horn, nightster, problem

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  #1  
Old 3 Days Ago
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Default Help: Weird electrical gremlin 08 Nightster

It's a long list of recent changes to include one accident, but recently my horn just started going off on its own. I had just finished replacing switch housings bar clamps etc so my first thought was that I pinched a wire. but I disassembled the swich housings, and pulled the wire cover back to reveal no wires are pinched to the point of a short. I have scoured the horn harness back to the plug with no damage.

- No stock horn- double hella supertones horns setup with relay and power tapped off of fuse block
- switch housings completely torn down and it still happens
- with switch housing harness unplugged it does not go off.
- does not seem to do it with the relay disconnected and single horn hooked up to stock wires
- when it goes off, it chirps, honks for s few seconds, then stays on...it stops when I hit the horn button. Then goes off on its own again.

Not finding the simple cause first, I traced the wires back under the lifted gas tank and DID find a small pinched area in the power wire that goes to the relay. Looked like it might have grounded to the frame but when I turned the ignition back on after moving the wire away from the frame, it still went off...

So here I am, trying to get my bike put back together after a small accident, and I am left scratching my head.

I have just recently replaced headlight and was working on a cheap LED rear lighting solution when the bike started screaming (honking) at me.

BTW, the hella supertones are freaking loud
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  #2  
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sounds (pun intended) like a bad switch.
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Put a meter on the wiring and do a wiggle test at every connection/junction & with the button itself...

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So I dont have a meter yet, but doing some troubleshooting now. when remiving the relay. The problem is gone. So I replaced the relay. checked, still does it. Disconnected the horns from the relay and I can feel the relay vlick off and on by itself. Taped up the 12v supply just incase, still doing it. So it would have to be somewhere in the stock harness... Could something be causing feedback in the grounding or something. still troubleshooting. grrr
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Plus with the relay removed, a wiggle test reveals no problems with the switch...
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Quote:
Originally Posted by projectracerabbit View Post
Not finding the simple cause first, I traced the wires back under the lifted gas tank and DID find a small pinched area in the power wire that goes to the relay. Looked like it might have grounded to the frame but when I turned the ignition back on after moving the wire away from the frame, it still went off...
I, personally, would open up this section of the harness and check for boken wires or cuts etc.
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I think I have a grounding problem.

Here's the current situation, I got tired of hearing the horn honk, and don't want to upset my neighbors, so I hooked the horn wires up to my new LED light pod. here's where it gets interesting. When I hooked the postive wire up to the light, it lit up a little. With out the ground wire. I currently have the pod connected to the clutch handle, where the factory turn signals normaly mount. When I move the clutch cable, I notice the light flickers, this explains why the relay kept activating.
When I hook up the negative to the negative horn wire, the flickering stops but it is still getting enough juice to turn the LEDs on a little, not full bright but very dimly lit. I have wiggled just about everything I can think of and cannot get it to go completely off unless I unplug the left side wire harness.
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the led might have a ground to case and when you hooked up the power, it will light up. i think you have an issue internal to the harness, like something is fused to power or the switch could be internally shorted.
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