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Indicator bulbs and the dominoe effect - 79 Gs850

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    Indicator bulbs and the dominoe effect - 79 Gs850

    So new Reg/Rect (sh775) installed, new dynateck coils, electronic ignition,new stator, and things are looking up. Clean connections, look over wiring, and conduct recommended system testing. In the middle of this job , I sourced a couple new instrument panel indicator bulbs. I couldn't find an exact match at parts store, but looked really close. While doing charging system tests, as recommended, noticed I wasn't getting full charge . I seemed to have a voltage leak in system. After hours of tedious searching with multimeter, I discovered the new bulbs were shorting . There was continuity between pos and neg through the bulb. Is this possible?? Continuity between the centre pin and metal banding of bulb.Is it possible $2 in bulbs could cripple my new 21st century ignition/ charging system?

    #2
    All incandescent bulbs will show continuity or near a zero ohm reading. Perfectly normal. Look elsewhere for the problem.

    When you say it's not getting to full charge, exactly how are you determining this?
    http://img633.imageshack.us/img633/811/douMvs.jpg
    1980 GS1000GT (Daily rider with a 1983 1100G engine)
    1998 Honda ST1100 (Daily long distance rider)
    1982 GS850GLZ (Daily rider when the weather is crap)

    Darn, with so many daily riders it's hard to decide which one to jump on next.;)

    JTGS850GL aka Julius

    GS Resource Greetings

    Comment


      #3
      When doing charging test, all readings were almost a full volt to low. So battery voltage ignition off-12.6, battery voltage ignition on - 11.8. With bike running voltage around 12.3, rev to 5000 rpm voltage goes up to around 12.8 . There's seems to be an attempt to fix wiring at some point as there's multiple splices and several blown fuses when I bought bike.

      Comment


        #4
        When what the battery last replaced?
        http://img633.imageshack.us/img633/811/douMvs.jpg
        1980 GS1000GT (Daily rider with a 1983 1100G engine)
        1998 Honda ST1100 (Daily long distance rider)
        1982 GS850GLZ (Daily rider when the weather is crap)

        Darn, with so many daily riders it's hard to decide which one to jump on next.;)

        JTGS850GL aka Julius

        GS Resource Greetings

        Comment


          #5
          New battery. Unfortunately so many electrical issues when I bought the bike I never had a chance for a 'baseline' to start with, you know what I mean. Dead battery, fried stator, corroded contacts, etc. Bikes actually in good condition, just need to solve this frustrating bugbear! Dynatech (very helpful) gave me some tests for the gnition system. I was surprised there was continuity between some of electronic ignition wires and ground on the tests. This 'may' indicate a problem with ignition module, but recommended looking for possible leak in system before deciding electronic ignition is defective. Which I agree with.

          Comment


            #6
            Check all your connections from the stator to the R/R. Verify your voltage output directly at the R/R red and black wires. Check your stator output with the R/R disconnected. At 5K rpm, it would be near 80V AC between each leg.
            http://img633.imageshack.us/img633/811/douMvs.jpg
            1980 GS1000GT (Daily rider with a 1983 1100G engine)
            1998 Honda ST1100 (Daily long distance rider)
            1982 GS850GLZ (Daily rider when the weather is crap)

            Darn, with so many daily riders it's hard to decide which one to jump on next.;)

            JTGS850GL aka Julius

            GS Resource Greetings

            Comment


              #7
              Also try another voltmeter, or use that one to test a known good bike\car. It just may read low. Check grounds!!!!!!
              sigpic
              09 Kaw C14 Rocket powered Barcalounger
              1983 GS1100e
              82\83 1100e Frankenbike
              1980 GS1260
              Previous 65 Suzuki 80 Scrambler, 76 KZ900, 02 GSF1200S, 81 GS1100e, 80 GS850G

              Comment


                #8
                Thanks responders! I was also wondering about trying straight stator output brfeore charge descends into wiring morass . Advice greatly appreciated, I was about ready to park the beast for the summer.

                Comment


                  #9
                  Originally posted by knewel View Post
                  Thanks responders! I was also wondering about trying straight stator output brfeore charge descends into wiring morass . Advice greatly appreciated, I was about ready to park the beast for the summer.
                  You know there are procedural tests already define in order to diagnose your charging system right (not to mention those in my signature opps I guess I did ?

                  Comment


                    #10
                    The 3 stator wires should go straight to the SH775 R/R inputs and not go through the harness at all. The + output from the R/R should go to the red wire that the old R/R went to and the ground connection can go straight to the battery minus terminal.
                    http://img633.imageshack.us/img633/811/douMvs.jpg
                    1980 GS1000GT (Daily rider with a 1983 1100G engine)
                    1998 Honda ST1100 (Daily long distance rider)
                    1982 GS850GLZ (Daily rider when the weather is crap)

                    Darn, with so many daily riders it's hard to decide which one to jump on next.;)

                    JTGS850GL aka Julius

                    GS Resource Greetings

                    Comment


                      #11
                      You say you replaced the stator. How many poles on the new stator?

                      If there were 12, go ahead and check the stator output. If there were 18 poles, better plan on getting the proper stator.

                      .
                      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


                        #12
                        hmm... i'll have to check that (as well). It was from a recommendation here on the forum. And I know I specified the bike when I ordered. But, you never know...

                        Originally posted by Steve View Post
                        You say you replaced the stator. How many poles on the new stator?

                        If there were 12, go ahead and check the stator output. If there were 18 poles, better plan on getting the proper stator.

                        .

                        Comment

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