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Thread: Replace a missing horn?

  1. #1
    Junior Member
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    Replace a missing horn?

    I virtually never have occasion to use the horn on my NC700, so I was a bit surprised the other day when I finally tried to beep at a van merging into me, only for it not to work. I checked it out when I got home and found a rather stark reason - my horn was missing altogether, apparently torn or broken right off the bike, along with the wires running to it. Picture attached:

    Replace a missing horn?-20181101_195922-jpg

    I'd like to replace it, obviously. The problem is with those power wires for it. There's no visible trace of them left on the bike, and the shop manual I have is surprisingly unhelpful in telling or showing exactly where they're supposed to come from.

    Replace a missing horn?-shop-jpg

    The only place that seems plausible to me is up into the wiring harness there. Problem is, it seems awfully small - and as you can see, I've cut into mine a decent distance and have only been able to find the two wires going to the O2 sensor and the EOP switch. Which leaves me a bit stumped. Can anybody help me out? Where are those horn wires actually meant to hook up? And if they eventually end up going into a junction somewhere above the engine, as I suspect, am I going to be able to attach a new one without taking virtually all the bodywork off my bike?

  2. #2
    Senior Member Replace a missing horn? davidc83's Avatar
    Bike: Suzuki C50; 2009 klx250sf; 2013 Nc700
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    Here is the schematic for wire harness on my 2013 Nc700x from bike bandit. I am not very good at reading schematics and my bike is currently at home tucked away from the rain we have had for 3 days now.
    2013 Honda NC700X Parts - Best OEM Parts Diagram for 2013 NC700X Motorcycles
    [SIGPIC][/SIGPIC]

  3. #3
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    Hm. Yes, that's a little unclear - the horn wires might be that pair a little to the left of where they show "24," perhaps? Though if so, it does seem to show them heading into that bundle that I cut into without success. Thanks for the link.

  4. #4
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    According to the Service Manual (all NC700 models), the wires for the horn are Black with a Green trace (hot) and solid Green (ground).

  5. #5
    Senior Member Replace a missing horn? GregC's Avatar
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    Quote Originally Posted by b_rubenstein View Post
    According to the Service Manual (all NC700 models), the wires for the horn are Black with a Green trace (hot) and solid Green (ground).
    Here’s a snapshot of the horn portion of the schematic showing these two wires.




    Sent from my iPhone using Tapatalk

  6. #6
    Senior Member Replace a missing horn? davidc83's Avatar
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    Quote Originally Posted by b_rubenstein View Post
    According to the Service Manual (all NC700 models), the wires for the horn are Black with a Green trace (hot) and solid Green (ground).
    I just looked at the wires and both are solid black. Kinda dark in my garage so i will look agauhin later with a bright light, but if there is green, it is a very dark (blackish) green

    Sent from my SM-S327VL using Tapatalk
    [SIGPIC][/SIGPIC]

  7. #7
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    Thanks, David, Greg. But do those wires appear to enter the wire bundle I have pictured on the left-hand side there?

  8. #8
    Senior Member
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    Quote Originally Posted by davidc83 View Post
    I just looked at the wires and both are solid black. Kinda dark in my garage so i will look agauhin later with a bright light, but if there is green, it is a very dark (blackish) green
    There is black sleeving over the wires where they attach to the horn.

  9. #9
    Senior Member Replace a missing horn? davidc83's Avatar
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    Quote Originally Posted by b_rubenstein View Post
    There is black sleeving over the wires where they attach to the horn.
    Yep just realized after getting down and taking close up picture.
    Replace a missing horn?-horn-jpg
    [SIGPIC][/SIGPIC]

  10. #10
    Senior Member Replace a missing horn? davidc83's Avatar
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    Quote Originally Posted by StrudelMan View Post
    Thanks, David, Greg. But do those wires appear to enter the wire bundle I have pictured on the left-hand side there?
    Yes they do go into the wire bundle. According to the schematic, should be 4 wires in that small bundle.
    [SIGPIC][/SIGPIC]

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