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Post by scooter on Oct 16, 2014 5:06:16 GMT -5
I am fixing up a 2009 Kinroad 150cc scooter and the tach is not working. The lights, dash lights, speedometer and fuel gauge all work fine, but the tach does nothing. Would someone tell me how the tach works, like where the wires from the tach go to on the bike, and how to troubleshoot it? I'd like to learn how to fix electrical things and I could really some expert advice. Thank you.  |
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Post by xyshannen on Oct 16, 2014 8:34:09 GMT -5
I just went through this..well mine worked just worked all wonkey.
If your tach has separate light and tack power cables. Run the 2 for the light off of your scoots head lamp or cluster light power. Run the two that power the tack off of your battery with the negative feeding off of your key ignition. Run the 5th wire (signal wire) off of the wire feeding your coil. Check with a volt meter for witch one is powered and it should work. I just hooked the wire up onto the connection at the coil.
I ran both power feeds from my lights and it caused my tack to work weird...but once I put a better CDI on it worked just fine. Dunno why, it was thought that because I don't get a full 12 volts to my lights unless I'm running above idle speed, was causing some weird interference, but putting on a new CDI it works just fine.
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Post by scooter on Oct 16, 2014 23:39:16 GMT -5
I just went through this..well mine worked just worked all wonkey. If your tach has separate light and tack power cables. Run the 2 for the light off of your scoots head lamp or cluster light power. Run the two that power the tack off of your battery with the negative feeding off of your key ignition. Run the 5th wire (signal wire) off of the wire feeding your coil. Check with a volt meter for witch one is powered and it should work. I just hooked the wire up onto the connection at the coil. I ran both power feeds from my lights and it caused my tack to work weird...but once I put a better CDI on it worked just fine. Dunno why, it was thought that because I don't get a full 12 volts to my lights unless I'm running above idle speed, was causing some weird interference, but putting on a new CDI it works just fine. Thank you, Shannen. |
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Post by dmartin95 on Oct 16, 2014 23:59:30 GMT -5
And just to make it easier, the colors for the tach are as follows:
Trigger/pick-up wire: Yellow with a black stripe
12v Power: Solid Black
12v Ground: Soild Green
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Post by scooter on Oct 17, 2014 4:50:40 GMT -5
And just to make it easier, the colors for the tach are as follows: Trigger/pick-up wire: Yellow with a black stripe 12v Power: Solid Black 12v Ground: Soild Green Thank you, Dmartin! |
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Post by dmartin95 on Oct 17, 2014 13:27:29 GMT -5
Your welcome!
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Post by scooter on Oct 21, 2014 23:20:10 GMT -5
I just went through this..well mine worked just worked all wonkey. If your tach has separate light and tack power cables. Run the 2 for the light off of your scoots head lamp or cluster light power. Run the two that power the tack off of your battery with the negative feeding off of your key ignition. Run the 5th wire (signal wire) off of the wire feeding your coil. Check with a volt meter for witch one is powered and it should work. I just hooked the wire up onto the connection at the coil. I ran both power feeds from my lights and it caused my tack to work weird...but once I put a better CDI on it worked just fine. Dunno why, it was thought that because I don't get a full 12 volts to my lights unless I'm running above idle speed, was causing some weird interference, but putting on a new CDI it works just fine. Thank you, Shannen. Woohoo! Yeah! The coil seems to be getting a signal from the yellow and black wire, as it won't start if I disconnect it, but somewhere on the way to the tach there must be a break. I ran a wire straight from the tach to the same leg on the coil along with the other wire and the tack worked! Nice! Thank you! Is it okay to just run a separate line from the tack and join it at the coil with the other black and yellow wire or is there a better way? |
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Post by dmartin95 on Oct 22, 2014 3:24:56 GMT -5
Short Answer - Yes, you could just by-pass the original and re-route a new wire from the tach to the coil....
Long Answer - Is still a yes but I would like to add some info.... Not too long ago, one of my scooters started having an issue of when I hit a bump, it would stall... First thought was a damaged wire... Once I got it home, I started removing the plastic to get to find my broken wire... What I discovered was that when the manufacturer put the scooter together, my wiring harness got sandwiched in between the seat compartment and the frame, making each time I hit a bump do more and more damage.
I un-taped my entire harness and discovered other wires that would have soon been damaged as they were being sandwiched as well. So I re-routed the entire harness and was able to prevent further damage. Hence the reason for the long answer... Even though you could just simply re-route and by-pass the wire, replacing the original would allow you discover what caused the original damage and if can prevent further damage... Afterall, your tach wire is not ran by itself and whatever caused the damage may be about to damage more wires.
If it were me, I would replace the original wire. Anyhow, good luck with your fix with whatever method you chose....
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Post by xyshannen on Oct 22, 2014 15:58:33 GMT -5
Eh....think this is a customers bike...next wire fault equals more shop time equals more chaching...lol
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Post by scooter on Oct 23, 2014 1:17:40 GMT -5
Eh....think this is a customers bike...next wire fault equals more shop time equals more chaching...lol Not me. I like satisfied customers. I am fixing this one to sell and I wanted to get everything working, within my abilities. Thanks to you guys, I got it fixed. There was a loose connection at the CDI due to a loose blade connector on the black and white wire, the kill wire. It was also broken on the way to the kill switch. Someone had switched the black/white wire with the black/yellow wire, the kill and tach wires, so the kill switch would work, but they killed the tach connection in the process. Everything is working now, and I am glad you guys encouraged me to look into the problem rather than just running an extra wire. I now know how the kill switch connects to the CDI and also how the tach is connected. A big accomplishment for me.  If anything, knowing everything is working well will give me more leverage in the sale, resulting in more cha-ching that way.  |
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Post by scooter on Oct 23, 2014 1:21:04 GMT -5
Long Answer - Is still a yes but... If it were me, I would replace the original wire. Anyhow, good luck with your fix with whatever method you chose.... I am fixing this one to sell and I wanted to get everything working, within my abilities. Thanks to you guys, I got it fixed. There was a loose connection at the CDI due to a loose blade connector on the black and white wire, the kill wire. It was also broken on the way to the kill switch. Someone had switched the black/white wire with the black/yellow wire, the kill and tach wires, so the kill switch would work, but they killed the tach connection in the process. I put the wires back in their proper positions and fixed the loose and broken connections, and everything is working now. I am glad you encouraged me to look into the problem rather than just running an extra wire. I now know how the kill switch connects to the CDI and also how the tach is connected. A big accomplishment for me. Have a bone, man. |
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Post by xyshannen on Oct 23, 2014 8:04:11 GMT -5
scooter I was joking man...sorry sarcasm doesn't come across in print very well. Glad you got if fixed!
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Post by dmartin95 on Oct 23, 2014 9:32:43 GMT -5
A big accomplishment for me. Have a bone, man. Good Job!  That is a big accomplishment indeed! A Scooter that is fixed right will in fact give more "cha-ching" than one that's all patched up.... It also demonstrates an awesome work ethic.... My dad always told me; "If you're going to bother to do something, do it right or don't do it all"... It's something I try and live by and has served me well. Anyhow, glad ya got it fixed (and fixed right) and thanks for the Bone! |
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Post by scooter on Oct 23, 2014 21:29:51 GMT -5
Thanks, Shannenn! I know people who fix and sell transportation products often have a bad reputation and for good reason. If I'm going to do service, I want to be someone people can count on and trust.  |
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