Headlight/turn signals/warning lights out

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  • andys116
    #1

    Headlight/turn signals/warning lights out

    Hi:

    Long time since I posted in the forums - at least 8 yrs. I own a 1981 GS1100E - I've had it 13 years. Anyway, just cruising along and my headlight, all (rear and front) turn signals, and panel/diagram lights (but not oil and neutral) are out.

    Bike starts - brake light works - oil and neutral work - but all else electrical that I can see is out.

    Brought out my manual to troubleshoot and can't really make heads or tails. One thing I did do is removed what I think is the signal control unit that was under the left side panel - part 374-6 (small black box held by a clip with 6 wires coming out into a clip). I was surprised to find that when I unhooked the control unit, the turn signals now actually work. but none of the other lights work.

    Checked fuses and ground.

    Any suggestions? - I think I may need to replace that box - probably fried, but if I do that, will the other lights somehow work? I assume the problems are combined and perhaps a faulty signal control box is causing a short that is shutting down most (but not all) of the lighting, but not sure.

    Thanks!

    Andy
    Tags: None
    • tom203
      Forum Guru
      Past Site Supporter
      • Aug 2010
      • 8925
      • Norway,Maine
      #2
      Well, since you abandoned the forum years ago, this guy Basscliff has compiled an info warehouse- here's a sample color wiring diagram, might not be exactly like your 81, but probably offer good clues

      http://members.dslextreme.com/users/bikecliff/images/GS1100G_1982_wiring.jpg
      1981 gs650L

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

        Comment

        • 2BRacing
          Forum Mentor
          • Jan 2009
          • 793
          • Onrus, near Hermanus, South Africa
          #3
          Have you checked to see if the headlight globe has not blown? If your R/R is defective,you could be overcharging the battery and the high voltage burns the globe out.
          1981 GS850G "Blue Magic" (Bike Of The Month April 2009)

          1981 GS1000G "Leo" (Bike Of The Month August 2023)

            Comment

            • BassCliff
              #4
              Hi,

              Click the link in my sig to visit my little website. I'm sure you will find something that can help.

              Yes, get the wiring diagram from my little website. Have a look at this tip from Mr. Steve: Simplify The Wiring Diagram. It can aid your troubleshooting. Check your fuses, and fuse box connections. The back side of a stock 30 year old fuse box can get really nasty.


              Thank you for your indulgence,

              BassCliff

                Comment

                • gustovh
                  Forum Sage
                  Past Site Supporter
                  • Oct 2006
                  • 4979
                  • Vernonia
                  #5
                  Just went through that with my 850, turned out to be a bad connection in the plastic connector for the light circut that is under the side pannel not the headlight. Looked at it and naaaaa can't be that, ya right, it turned out to be the problem, fixed it and game over.
                  V
                  Gustov
                  80 GS 1100 LT, 83 1100 G "Scruffy"
                  81 GS 1000 G
                  79 GS 850 G
                  81 GS 850 L
                  83 GS 550 ES, 85 GS 550 ES
                  80 GS 550 L
                  86 450 Rebel, 70CL 70, Yamaha TTR125
                  2002 Honda 919
                  2004 Ural Gear up

                    Comment

                    • andys116
                      #6
                      Thanks

                      Amazing amount of information. Thanks for the responses - I have a few things to go on.

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