81 gl500i little black box behind speedo burned. What is it? What does it do?
Results 1 to 3 of 3
  1. #1
    Junior Member
    Join Date
    Nov 2014

    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.

    81 gl500i

  2. #2
    Super Moderator ramprat06's Avatar
    Join Date
    Aug 2010
    Vancouver, WA USA
    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.
    G-Loria's Story including Part III > I miss her dearly, but she is in good hands. Part III included at the end of the link.

    Forum Settings that everyone should make

    Photo and Video posting Tips

    The WIKI link for all the good tech stuff. including free FSM's
    with addendums

    Larry's most excellent CX/GL Carb book link

    Please go into the Tapatalk app's settings and turn off the "auto signature" feature. Thank You.

  3. #3
    Junior Member
    Join Date
    Oct 2014
    San Francisco, California
    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.

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Similar Threads

  1. Changing stock speedo to mini speedo
    By Dieboldly in forum CX Customization and Mods Forum
    Replies: 4
    Last Post: 11-18-2014, 10:07 PM
  2. flasher relay burned out
    By technodrive in forum Technical Help Forum
    Replies: 5
    Last Post: 03-28-2013, 07:43 PM
  3. burned!
    By Thumper in forum Off-Topic Posts
    Replies: 7
    Last Post: 11-19-2012, 12:56 PM
  4. Suddely BLACK BLACK Plugs
    By chiangmaiglman in forum Technical Help Forum
    Replies: 5
    Last Post: 11-06-2012, 04:36 PM
  5. '78 Speedo problem, speedo doesn't spin & Tach issues
    By RAFster122s in forum Technical Help Forum
    Replies: 11
    Last Post: 09-27-2010, 10:58 AM