81 gl500i little black box behind speedo burned. What is it? What does it do?
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  1. #1
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    81 gl500i little black box behind speedo burned. What is it? What does it do?

    A small black box 1/2" x 1" x 1", located behind speedo smoked and burned. What does it do? Tail lights quit working. Might be related.

    Brian
    81 gl500i

  2. #2
    Super Moderator ramprat06's Avatar
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    Welcome aboard.

    Chances are that is the 7 volt regulator that the temperature gauge relies on. Is your temp gauge working when the engine is fully warmed? It very well could be related to your rear lights, and perhaps a bunch of other maladies in wiring. Tread carefully, electrical is no fun.



    You can find a free download factory service manual, as we as a wiring diagram in the WIKI link below. Add your location to your profile to help others help you.

    Joel in the Couve
    Last edited by ramprat06; 11-30-2014 at 05:08 PM.
    May the myriad of wheels in your head, keep the two wheels between your legs rubber side down.

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  3. #3
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    Might have blown the fuse when some things shorted, knocking out your tail lights. Or its possible your fuses shorted out somehow, and then the circuits in the box became its own fuse and just blew.

    1979 CX500C. Deluxe Tank, Ignitech, and lots of black paint.
    1976 CB360T.

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