Register now to get rid of these ads!

Technical Gauge ground burns up

Discussion in 'The Hokey Ass Message Board' started by desotoman53, Mar 11, 2020.

  1. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    I hooked up my battery gauge and as soon as I hooked up the battery the ground burnt. It was ground under May Day the same place I have the ignition grounded.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  2. tb33anda3rd
    Joined: Oct 8, 2010
    Posts: 17,584

    tb33anda3rd
    Member

    volt meter or amp gage?
     
  3. alchemy
    Joined: Sep 27, 2002
    Posts: 22,718

    alchemy
    Member

    Is a “battery gauge” a voltmeter or an amp gauge? What’s a May Day?
     
    RICH B and Johnny Gee like this.
  4. squirrel
    Joined: Sep 23, 2004
    Posts: 59,980

    squirrel
    Member

    probably an ammeter, connected as if it were a volt meter

    They work differently. An ammeter is a wire, if you connect it across + and - you will melt something. If you connect it in series with the main power wire that connects the battery to the rest of the system, it will work fine.
     
  5. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    It’s the regular 1951 gauges. It was suppose to say under my dash.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  6. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    Basically I hooked up the 1951 battery gauge the positive from my ignition and the negative grounded under my dash. As soon as I hooked up the battery it burnt the ground.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  7. Chappy444
    Joined: Jan 27, 2012
    Posts: 1,337

    Chappy444
    Member

    Negative ground or positive ground?
    Chappy
     
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 59,980

    squirrel
    Member

    yup, exactly what I suspected. It is NOT a volt meter. you can't do that, it won't work.
     
    olscrounger and VANDENPLAS like this.
  9. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

  10. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

  11. BJR
    Joined: Mar 11, 2005
    Posts: 11,321

    BJR
    Member

    An amp meter needs to be in series with everything else. A volt meter just needs to have a positive wire connected to one side of it and ground the other side of it.
     
    loudbang and stillrunners like this.
  12. alchemy
    Joined: Sep 27, 2002
    Posts: 22,718

    alchemy
    Member

    Yep, squirrel is right, of course.
     
  13. BJR
    Joined: Mar 11, 2005
    Posts: 11,321

    BJR
    Member

    What you have is an amp gauge.
     
    loudbang likes this.
  14. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    Sorry I’m lost. I have the positive coming from my ignition wouldn’t that be a series?


    Sent from my iPhone using The H.A.M.B. mobile app
     
  15. BJR
    Joined: Mar 11, 2005
    Posts: 11,321

    BJR
    Member

    The positive from the battery or usually from the starter motor connection goes to the amp gauge, then to the ignition switch which powers everything else. That way the amp gauge reads all the current going through the system, except for what goes through the starter motor.
     
  16. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    Sorry I’m just a jack***. My line from the starter goes into my fuse box then from there one of my ignition lines goes into my ignition. I got a new wire harness from easy wire and that’s the way it’s set up. I can run another ignition wire to my gauge instead of jumping it from my ignition or come from my gauge to my ignition.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  17. BJR
    Joined: Mar 11, 2005
    Posts: 11,321

    BJR
    Member

  18. BJR
    Joined: Mar 11, 2005
    Posts: 11,321

    BJR
    Member

    Cut the line from the starter and fuse box and put the amp gauge there. Make sure the amp gauge reads higher than the alternator output, or you will burn out the gauge if the alternator ever reaches full output.
     
  19. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

  20. desotoman53
    Joined: Aug 5, 2009
    Posts: 145

    desotoman53
    Member
    from Conroe

    Thanks


    Sent from my iPhone using The H.A.M.B. mobile app
     
  21. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,483

    Ebbsspeed
    ALLIANCE MEMBER

    When you hooked up that ground the ammeter needle jumped real hard in one direction. That needle was centered right on the "0" when it came from the factory. Has it always leaned towards the +, or has that happened since you created a short through it?
     
  22. squirrel
    Joined: Sep 23, 2004
    Posts: 59,980

    squirrel
    Member

    Electricity is mysterious. It's not surprising you don't know how this stuff works. Ammeters have not been used in cars for a long, long time. Don't knock yourself.

    You might want to consider not having a "battery" gauge at all. But if you do wire it, according to that neat drawing above, make sure you understand about wire size, current that the alternator can output, and safe wire routing, or the burned up wires could turn into a burned up car.
     
    Pist-n-Broke and pprather like this.
  23. pprather
    Joined: Jan 10, 2007
    Posts: 8,986

    pprather
    Member

    The original generator on the 1951 was probably only able to put out 30 amps which if true would indicate you have a 30 amp gauge.
    What generator / alternator are you using now?

    Phil
     
  24. olscrounger
    Joined: Feb 23, 2008
    Posts: 4,840

    olscrounger
    ALLIANCE MEMBER

    Squirrel and others nailed it. Maybe pull that gauge and send it to someone like Williamsons and have converted to Batt gauge (volt meter)
     
  25. stillrunners
    Joined: Aug 27, 2009
    Posts: 10,590

    stillrunners
    Member
    from dallas

    good thread....think I'm learning something.....
     
  26. Corn Fed
    Joined: May 16, 2002
    Posts: 3,429

    Corn Fed
    Member

    Is it adviseable to put a fuse (rated the same amps or slightly less as the gauge) between the battery and Amp gauge? Or maybe a fuseable link instead of a fuse?
     
  27. squirrel
    Joined: Sep 23, 2004
    Posts: 59,980

    squirrel
    Member

    Usually fuses or fusible links are related to the size of the wire feeding the circuit. If you don't think the gauge will handle the current that the circuit carries, it's probably a good idea to not use that gauge.
     
    Pist-n-Broke, firstinsteele and BJR like this.

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.