1987 gs450 ignition box wiring help

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  • chris032188
    • Mar 2026

    #1

    1987 gs450 ignition box wiring help

    My wiring diagram is pretty much crap and I am trying to get a break down of the wires going to the ignition box. Does anyone know what colors go to wear?
  • posplayr
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    • Dec 2007
    • 23673
    • Tucson Az

    #2
    Originally posted by chris032188
    My wiring diagram is pretty much crap and I am trying to get a break down of the wires going to the ignition box. Does anyone know what colors go to wear?
    All the information is in the manual.

    Comment

    • jeffasaurus2

      #3


      Manual in the top table middle, wiring diagram in the top table right.

      Comment

      • chris032188

        #4
        That wiring diagram is different then mine - colors are off and my ignitor unit has 7 wires that has a 6. I was able to trace where each one went.. Now the only thing I am confused about is my signal generator... It has 4 wires coming out
        G/Y-> UNKOWN BY ME - IT RUNS UP TO THE IGNITION AREA, BUT I AM NOT SURE WHAT THIS CONNECTION DOES
        G/W -> IGNITOR (STAYS GW)
        BLACK/W -> IGNITOR (BLACK BLUE)
        BROWN -> IGNITOR (STAYS BROWN)

        If anyone knows what the g/y goes to please let me know :-)

        Comment

        • chris032188

          #5
          Welp figured out the g/y is for a oil indicator I think

          Comment

          • posplayr
            Forum LongTimer
            GSResource Superstar
            Past Site Supporter
            • Dec 2007
            • 23673
            • Tucson Az

            #6
            Originally posted by chris032188
            Welp figured out the g/y is for a oil indicator I think
            Green/ yellow is starter solenoid

            Comment

            • Steve
              GS Whisperer
              • Jun 2005
              • 35927
              • southwest oHIo

              #7
              Originally posted by posplayr
              Green/ yellow is starter solenoid
              Green/yellow or yellow/green?

              Suzuki did a pretty good job of keeping the color code consistent across all the models. On the 850, green/yellow (green wire with a yellow stripe) is, in fact, the wire to the oil pressure sending unit, so I would guess that is true for the 450, also.

              No idea why that would be running to the ignitor, unless it is a safety shut-off in case of low oil pressure.

              .
              sigpic
              mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
              hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
              #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
              #2 son: 1980 GS1000G
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              Siblings and Spouses
              Mom's first ride
              Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
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              Comment

              • chris032188

                #8
                Wasnt running from ignitor - it was coming from the same connector as the generator.. And a little tip for anyone if you have a downloaded service manual you can rotate the screen and it makes it readable haha

                Comment

                • Steve
                  GS Whisperer
                  • Jun 2005
                  • 35927
                  • southwest oHIo

                  #9
                  Originally posted by chris032188
                  And a little tip for anyone if you have a downloaded service manual you can rotate the screen and it makes it readable haha
                  You can also click on the + button to enlarge it to make it even MORE readable.

                  Also helps if you are using a real computer, not a "smart" phone.

                  .
                  sigpic
                  mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                  hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                  #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                  #2 son: 1980 GS1000G
                  Family Portrait
                  Siblings and Spouses
                  Mom's first ride
                  Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                  (Click on my username in the upper-left corner for e-mail info.)

                  Comment

                  • Guest

                    #10
                    Green with yellow tracer on a 450 coming from under the timing cover is definitely the oil pressure sensor... the sensor is under the signal generator plate.

                    Comment

                    • chris032188

                      #11
                      Im looking at the diagram and I am a little confused about which wire on the ignitor feeds it the power.. I beleive its the orange/white, but I cant see where there line links into the power from the battery on the diagram

                      Comment

                      • Steve
                        GS Whisperer
                        • Jun 2005
                        • 35927
                        • southwest oHIo

                        #12
                        Yes, it is the orange/white wire. The other end of that wire is at the "kill" switch.

                        .
                        sigpic
                        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                        #2 son: 1980 GS1000G
                        Family Portrait
                        Siblings and Spouses
                        Mom's first ride
                        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                        (Click on my username in the upper-left corner for e-mail info.)

                        Comment

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