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  • Wiring help

    Since I started with a bare frame I'm having some wiring issues. The rear master cylinder brake light switch I bought from Yamaha has two black wires the manual shows a brown wire and a yellow wire (unless I'm color blind) does the wiring run up the front of the frame? The plug I found has the female ends facing a different direction then the wires on the switch I got from Yamaha. So frustrating! The engine and wiring harness are from a 2007 model

  • #2
    On the 99 thru 03 wire diagram shows The switch has 2 black wires that connects to the brown/yellow wire. Both connectors are black and that's where the color changes. I believe color should be the same on the 07s, but not 100% sure. Maybe someone will chime-in to verify this.
    Yes, the wires run up the front right frame tube.

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    • #3
      All the brake switch is doing is making a connection for current to flow to the brake light. Just connect the 2 wires from the switch into the harness where they are supposed to connect and the switch will work. And yes the switch wiring runs up the frame and connects somewhere around where the key switch connects IIRC.

      Rod

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      • #4
        Rob, send me a picture of the harness connector. I might have what your needing and can send you one.

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        • #5
          Duke the first pic is the brake switch, the second is the connector on the wiring harness with the yellow/brown wires

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          • #6
            Sorry for the delay. I'm still recovering from watching the Oklahoma/Oklahoma state game. I can't understand how OU can have such a dynamic offense and such a pitiful defense

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            • #7
              Rob, I have a replacement connector for the harness end, pictured on your number 2 photo. The wire pins can be removed out of the harness connector then install the pins into the the older style connector I'll send.
              I would send when I send the petcock, if that will work?
              Click image for larger version  Name:	IMG_1859.JPG Views:	1 Size:	85.3 KB ID:	46710Click image for larger version  Name:	IMG_1862.JPG Views:	1 Size:	89.5 KB ID:	46711

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              • Rob in FL
                Rob in FL commented
                Editing a comment
                That sounds great ! I appreciate your help. I will send you a message on the 1st for payment I'm doing pumpless and I will be buying the hsr45 carb. As soon as I buy that I would like to send that to you for tps install, that might be a short time though have to get everything back to Oklahoma first

              • Duke
                Duke commented
                Editing a comment
                No problem Rob. I'll take care of it.
                I'll pm you with a address and phone number today.

            • #8
              I'm giving the Pumpless Mod. a try . Should the two wires to the pump be connected together to complete this circuit ?

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              • #9
                No! If you do that it will blow a fuse. Just leave it unconnected.
                The two wire connector has one wire ground, and the other is + 12 volts when the key is turned on.

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                • Horsehammerr
                  Horsehammerr commented
                  Editing a comment
                  Thank You Duke. No start . Ran cable from pos. side of battery to discoed starter pole , one partial crank then stops over and over . going to pull starter and try cleaning it up . ?

                • Duke
                  Duke commented
                  Editing a comment
                  Check the compression relief solenoid too.

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