Honda CB450DX Cafe Racer - Speedo Warning Lights Wiring
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Honda CB450DX Cafe Racer - Speedo Warning Lights Wiring

This is a discussion on Honda CB450DX Cafe Racer - Speedo Warning Lights Wiring within the Technical forums, part of the Caferacer.net Forums category; Hi all, I'm having a few difficulties with wiring the warning lights on new speedo for my 1991 Honda CB450 DX. I've tried several combinations ...

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Thread: Honda CB450DX Cafe Racer - Speedo Warning Lights Wiring

  1. #1
    Junior Member Harry2509's Avatar
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    Honda CB450DX Cafe Racer - Speedo Warning Lights Wiring

    Hi all,

    I'm having a few difficulties with wiring the warning lights on new speedo for my 1991 Honda CB450 DX. I've tried several combinations but not getting very far (also unable to find a clear diagram for a 450DX)

    The speedo was provided with these instructions:

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Size:  1.80 MB

    And this is the loose wiring situation in the headlamp (7 wires):

    Name:  IMG_5758.JPG
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Size:  1.99 MB

    If anyone has any experience with wiring these speedo lights or has a similar bike some advice would be greatly appreciated.

    Thanks in advance

  2. #2
    Senior Member woodsman's Avatar
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    Get a volt meter and check the leads coming from the bike.

  3. #3
    Junior Member Harry2509's Avatar
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    Thanks, not that experienced with electrics.. roughly what voltages am I looking for?

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  5. #4
    Senior Member TrialsRider's Avatar
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    Is a 12 volt bike, everything you touch that is hot will be roughly 12.5 volts direct current.
    You need the real wiring diagram for your bike, should have been in the owner manual if not you need to find on on the net.

    ... how come nobody knows about electricity, are public school teaches just stupid on the subject now-a-days and skip teaching it?
    Last edited by TrialsRider; 06-09-2019 at 11:35 AM.

  6. #5
    Senior Member TrialsRider's Avatar
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    Is this anything like your bike? -> https://www.carlsalter.com/mcpdf/Hon...50_servico.pdf

  7. #6
    Senior Member woodsman's Avatar
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    Get a volt meter or 12vdc circuit tester, Turn on the key. Turn on the left signal, check wires until one makes the meter bounce, label it, Do the same for the right side, the high beam, one should show turning the lights on, one for neutral etc. Process of elimination.
    TrialsRider likes this.

  8. #7
    Junior Member Harry2509's Avatar
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    Yes that looks like the correct manual, will see if I can translate the Spanish electrical section.

    Cool, thanks for the tip Woodsman. I’ll give that a go with a voltmeter.

  9. #8
    Senior Member TrialsRider's Avatar
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    Is super easy to translate service manuals :| half the stuff is obvious because of the pictures and nomenclature.

  10. #9
    Junior Member Harry2509's Avatar
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    Still having a few issues, this is the diagram for my DX - http://oldmanhonda.com/MC/WiringDiagrams/CB350F.jpg
    Any idea how I would connect the positive wire from the speedo to harness?

    Cheers

  11. #10
    Senior Member 8ball's Avatar
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    Use the positive wire that used to go to the speedo back lights
    I always find a soap box useful to get on my high horse.

    Quote Originally Posted by roccitycafe View Post
    .... same thing with furniture, it doesn't have to be straight or not wobble, or keep thing from rolling off it, or not collapse when sat upon, it's personal taste man... if I want a dining room set that endangers the life of my dinner party guests, then it doesn't need second hand approval

    My GS550 Build Thread

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