Wiring issues, 12 lights on a 24 volt car

Discussion in 'Flat Fender Tech' started by 53m38a1, Apr 24, 2007.

  1. Apr 24, 2007
    53m38a1

    53m38a1 New Member

    Charleston, SC
    Joined:
    Feb 8, 2006
    Messages:
    31
    My m38a1 is still set up as a 24 volt set up, but according to my voltage tester, if I wire to the second battery in series, I am getting twelve volts. We have hooked up a fuse pannel and several 12 volt items to the fuse panel including headlights and tail lights. Both headlights and tail lights are wired to one fuse, and the brake lights wire runs through another fuse. The brake lights work fine, and for about five minutes, the headlights do too, but then they burn through fuses. So far I have gone as high as a 30 Amp fuse, and am afraid to go higher. Does anyone have any answers or suggestions?


    Editing note: Title should read 12 V lights on a 24 volt Jeep
     
    Last edited: Apr 24, 2007
  2. Apr 24, 2007
    Bill F

    Bill F Finally running

    Hillsboro NH
    Joined:
    Sep 22, 2002
    Messages:
    543
    try using the first battery
     
  3. Apr 24, 2007
    kaiser_willys

    kaiser_willys Well-Known Member

    Joined:
    Jan 7, 2007
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    1,524
    either convert to a 12 volt system,or buy the 24v bulbs,do you have 12v headlights for sure?? if not the lower voltage wiss cause one hell of a draw in amps.... if you do change over to 12v generator will need to be changed as well as the lights,oil psi gauge water and fuel,coil in the dist,think that about sums it up,amp meter will be ok it dosent measure volts just amps
     
    Last edited: Apr 24, 2007
  4. Apr 24, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
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    2,728
    Or a voltage reduction unit for your lights
     
  5. Apr 25, 2007
    Bill F

    Bill F Finally running

    Hillsboro NH
    Joined:
    Sep 22, 2002
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    543
    if you wire to the first battery you shouldnt have problems, dont ground to the chasie ground to the battery.
     
  6. Apr 25, 2007
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    18,204
    You need to wire in parallel to get 12V. You get 24V when the batteries are in series.

    Try it with just 1 battery. Also realize that halving the voltage doubles the current, but the power dissipation P quadruples when you double the current: P = I^2 R. Maybe your wiring can handle it, maybe not.
     

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