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jump starting 6 volt positive ground

Discussion in 'The Hokey Ass Message Board' started by honestjerry, Aug 21, 2007.

  1. honestjerry
    Joined:
    Oct 27, 2005
    Posts:
    17
    Location:
    Maryland

    honestjerry Member

    ok, school me on jumping a 49 ford, 6 volt positive ground. Can we use a 12 volt neg. car to do it? I know not to leave it hooked up too long and turn all other systems off, etc., but do how do we hook it up?
  2. junkyardjeff
    Joined:
    Jul 23, 2005
    Posts:
    4,589
    Location:
    Dayton Ohio

    junkyardjeff Member

    I have jumped 6 volt positive ground systems with 12 volts but do not run the vehicle with the 12 volts and have someone ready to yank the cables when it starts,with a 49 ford you should be able to push or pull it to start. Jeff
  3. terrarodder
    Joined:
    Sep 9, 2005
    Posts:
    1,098
    Location:
    EASTERN PA

    terrarodder Member

    Make sure you don't cross polarity, I lost a pair of jeans and a club jacket doing that, blew up the 6 volt battery.
  4. speedtool
    Joined:
    Oct 15, 2005
    Posts:
    2,545
    Location:
    Wichita, Kansas

    speedtool BANNED

    It's still positive to positive, negative to negative.
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  5. recardo
    Joined:
    Aug 31, 2006
    Posts:
    834
    Location:
    Winslow

    recardo Member

    Buy a second 6 volt battery and weld up a nice roll-around for it, as your first shop project.
  6. Fe26
    Joined:
    Dec 25, 2006
    Posts:
    543
    Location:
    Sydney Australia

    Fe26 Member

    Disconnect the battery from the donor car, ensure polarity is correct,
    turn your ignition switch on, place the "hot" jumper lead on the starter motor side of the solenoid, the starter will spin without damaging the 6v system, DO NOT press the starter button.
    Good luck
  7. adjustablejohnsons
    Joined:
    Feb 2, 2003
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    3,034
    Location:
    I bounce around. SouThe Villages, FL..Key West..N

    adjustablejohnsons Member

    Winner.
  8. Gorehound
    Joined:
    Jun 6, 2007
    Posts:
    100
    Location:
    Delaware

    Gorehound Member

    Just rewire the car for 12 volt. You know you love crawling
    in and out of damp musty old cars.:D
    Lee
  9. honestjerry
    Joined:
    Oct 27, 2005
    Posts:
    17
    Location:
    Maryland

    honestjerry Member

    not gonna rewire. wouldn't be prudent. just want to get it started, bring it home, fix what ails it and send it back to whence it came!
  10. DrDano
    Joined:
    Jul 10, 2003
    Posts:
    696
    Location:
    Fort Collins, CO

    DrDano Alliance Vendor

    Is this a British Ford or something? '49-'51 Fords were all positive ground, at least all the ones I owned and have seen were.
  11. Sawracer
    Joined:
    Jul 6, 2006
    Posts:
    1,315
    Location:
    socal

    Sawracer Member

    my 30 ford is 6V pos ground. It's fine and dandy when the car is running good. Start troubleshooting, cranking and forgetting to turn ignition on and, then you are screwed. It spins just fast enough for a well tuned setup. If you need more than that it's dead battery city. I have been fighting converting it but with the hi comp ovh setup, I know it's inevitable.

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