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    #1

    dim headlight

    Hello
    I have a 1982 gs 750t with 5500 miles on it. I am having a problem with the headlights and cluster lights. When I first start my bike the headlight and cluster lights are very brights, but after I put my bike in gear and drive the lights become very dim, to the point where I can't see my head light on the road. When I get home and I Park my bike the light is bright again . I am confused to what the problem is, this happens every day I ride my bike!!!
    Tags: None
    #2
    This sounds familiar- you likely have charging issues as I think I said before! Do some testing here's a quickee

    electrical_odd-n-ends
    http://members.dslextreme.com/users/storagecliff/images/electrical_odd-n-ends.html#A20


    Connections on these bikes get worst with age, so don't just throw new parts at it and hope for best. Fix it and ride safe .
    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

    Comment

      #3
      Master077...are you still around?

      Did you resolve this issue?
      '83 GS650G
      '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

      Comment

        #4
        Originally posted by BigD_83 View Post
        Master077...are you still around?

        Did you resolve this issue?
        He's gone Bigfoot hunting!
        1981 gs650L

        "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

        Comment

          #5
          Sorry for not replying sooner. I ended up replacing my stater, and I also created a ground going straight to the battery.
          Thanks for the help everyone. Now onto other problem's lol

          Comment

            #6
            What are reasonable voltage drops in the headlight circuit? I've dropped 0.6V at the supply side of the top three fuses and a further 0.2V by the time it gets to the headlamp connector plug. No drop between plug earth pin and battery negative.
            97 R1100R
            Previous
            80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

            Comment

              #7
              Originally posted by Brendan W View Post
              What are reasonable voltage drops in the headlight circuit? I've dropped 0.6V at the supply side of the top three fuses and a further 0.2V by the time it gets to the headlamp connector plug. No drop between plug earth pin and battery negative.
              V=I*R

              Compute R as V/I (I for a standard head lamp is 5 amps).

              A reasonable resistance is about 0.1 ohms and no more.
              (.6+.2)/5= 0.8/5 = 160 milliOhms; a little high.
              Last edited by posplayr; 07-11-2014, 04:47 PM.

              Comment

                #8
                Originally posted by posplayr View Post
                V=I*R

                Compute R as V/I (I for a standard head lamp is 5 amps).

                A reasonable resistance is about 0.1 ohms and no more.
                (.6+.2)/5= 0.8/5 = 160 Ohms; a little high.
                Am I missing something in the new-fangled math? Looks like the decimal place is right shifted. Did you mean 0.16 Ohms?
                '83 GS650G
                '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

                Comment

                  #9
                  Originally posted by BigD_83 View Post
                  Am I missing something in the new-fangled math? Looks like the decimal place is right shifted. Did you mean 0.16 Ohms?
                  No I was editing the mill-ohms and left off the "m".

                  Corrected now.

                  Comment

                    #10
                    It's OK I got it. Targets are good. Thanks.
                    97 R1100R
                    Previous
                    80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

                    Comment

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