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Help GSX250 wiring speedo help

Discussion in 'Suzuki 250cc Twins' started by gainey, Mar 24, 2015.

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  1. gainey

    gainey Active Member

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    Hi everyone,

    I bought this from ebay http://www.ebay.com.au/itm/271461854742?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT I know my first mistake, I can get everything to work and light up except for neutral.
    For some reason it will not light up, if I run straight power to it then yes the light glows green. I am thinking that maybe when it is in neutral that the power supply on the old gauges closes, so it gets no power and then lights up....also with that speedo the background lights come on as soon as you put the key in but know biggey.

    So could some one please help me to get the neutral light to light up when in neutral, is their something I can hook up in the line to help me.

    thankyou again


    jason
     
    gainey, Mar 24, 2015
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  2. Joker

    Joker See "about me" for contact details. Contributing Member

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    Checked the fuse? you haven't blown it have you?
     
    Joker, Mar 24, 2015
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  3. gainey

    gainey Active Member

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    Hi no the fuse is fine all the other lights work and if I put power straight to neutral then it lights up
     
    gainey, Mar 25, 2015
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  4. Evo

    Evo Well-Known Member

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    I'm no expert but I think you will find that you are in the right path with the neutral light.

    The original wiring will most likely be positive to the light, and then growing wire through the switch in the gear box that is open when in gear and closed when in neutral to complete the circuit.
     
    Evo, Mar 25, 2015
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  5. Moo

    Moo Plodge Racing!!!

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    agreed!!

    also check the neutral switch and give the contact a clean.
     
    Moo, Mar 25, 2015
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  6. gainey

    gainey Active Member

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    Great thanks for the input so if I clean the switch etc is their any way to make it work?
    Or what have I missed?

    Can I swap the lead around in the gear box somehow to make it work
     
    gainey, Mar 25, 2015
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  7. Evo

    Evo Well-Known Member

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    Always remember with electrical that there will always be multiple ways to achieve result.

    It seems that the neutral light on the speedo is set up for the positive wire being switched as opposed to the set up on the GSX where the negative is switched.

    I can't imagine that you would be able to change the switch in the gear box but if you can you would need to run a positive to the side of the switch that is currently grounded out. When in neutral you would then close the switch and complete the circuit.

    You can also achieve the result by using a relay.
    You will need a normally open relay. Put a positive to one side of the coil and on the other side of the coil connect the wire from/to the neutral switch. So then when the bike is in neutral the switch will close, complete the circuit and pull in the contacts.
    On the contacts you will need a positive on one side the a wire out to neutral light on the speedo
    So when bike is in neutral, switch closes, coil energises, contacts close providing 12v to the neutral light, light on, bike into gear switch opens, coil de energises, contacts open, light out.

    As I said first up I'm sure there are many more ways to do this.

    Disclaimer
    Half decent sparky but very fresh and amateur bike mechanic
     
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    Evo, Mar 25, 2015
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  8. gainey

    gainey Active Member

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    Grooooovy man thanks evo will be giving that a crack on the weekend
    Cheers
     
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    gainey, Mar 26, 2015
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  9. Evo

    Evo Well-Known Member

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    So was thinking about this issue as I am going to start the new wiring my bike and was thinking about your oil pressure switch. Is your light working correctly? Only ask this as it would appear that the oil pressure switch also appears to be the same set up as the neutral.
    Also how do you test this as you wouldn't want to run the bike on low oil?
     
    Evo, Mar 29, 2015
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  10. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Take the wire off the sender (switch) unit in the crankcase and touch to earth. Light should come on.

    Any of you blokes making these GSX mod bikes want a Suzuki speedo. It came off a TF185 ag-bike but would look cool on your mod with a clean up and new paint. Just pay the postage.
    Keepit Dam 3-15 007.JPG
    Keepit Dam 3-15 008.JPG Keepit Dam 3-15 009.JPG
     
    Murdo, Mar 29, 2015
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  11. gainey

    gainey Active Member

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    Hi all
    I tried a relay on the neutral light but it did not work may have to just leave it with no neutrel light
     
    gainey, Apr 8, 2015
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  12. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    The neutral light, being an LED is polarity sensitive and will only work with the power going the correct way. How did you work the relay? The light has to be earthed all the time, and power supplied through the relay when the neutral switch earths the relay.
    I used one of those speedos on my Suzuki bobber and could not get the neutral light to work, so left it blank.
     
    Murdo, Apr 8, 2015
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  13. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    My wiring loom didn't allow for my lights to be LED on my speedo, I had to wire in a resistor into the loom for each of the lights. They guy at Jaycar helped me with which resistors to use.

    *EDIT* 10 ohm i think....
     
    Ben Mulligan, Apr 8, 2015
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  14. gainey

    gainey Active Member

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    Hey murdo we tried a normally open relay but it did not work not to worry though
    I will post some picks of the bike and our mods soon I just made a basket to sit under the seat which will house all the electrics and got s colour made up for he tank and the front guard that I have cut down
    For the colours seat is tan do I am going
    Frame '- gloss black
    Motor - matte black black
    Front guard and tank British racing green metallic and polish up the metal parts where possible
     
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    gainey, Apr 8, 2015
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  15. gainey

    gainey Active Member

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    Hi Ben I though of going LEDs but I found a sweet set of bullet blinkers in Indonesia of ebay 8watt for $28 for 4 I couldn't resist
     
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    gainey, Apr 8, 2015
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  16. RDickens

    RDickens Active Member

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    RDickens, Jun 27, 2015
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  17. gainey

    gainey Active Member

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    Hi Rdickens at this stage no, we still could not get the neutral light to work. It lights up but won't work in the neutral position, ours was from eBay so your one might be different.
    We tried a relay but it did not work either I hope you get yours going.
    We decided just to leave the neutral light and move on.
    Sorry
     
    gainey, Jun 27, 2015
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  18. RDickens

    RDickens Active Member

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    Thanks for the reply. I hope I can figure it out. The speedo will be the last part of this project.
     
    RDickens, Jun 28, 2015
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  19. gainey

    gainey Active Member

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    Here's an update pic of the bad boy

    image.jpg image.jpg image.jpg
     
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    gainey, Jul 17, 2015
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  20. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    Looking sexy
     
    Ben Mulligan, Jul 17, 2015
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