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Thread: When did 12 volt start in the Willys Wagon

  1. #1
    Bigger Hammer mathew21's Avatar
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    When did 12 volt start in the Willys Wagon

    Seems to be a lot of electrical talk on the board lately it just got me wondering what year did Willys switch to a 12 volt system? I did google it but I found a few different answers.

    Thanks, Matt

  2. #2
    Well-Oiled mathman's Avatar
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    1957. That's based on the Autolite books. Prior to that only 6v components were listed. After that, 6v and 12v components were listed.
    David,
    1950 $WD Pickup: There is no apostrophe in Willys...

  3. #3
    Bigger Hammer mathew21's Avatar
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    WOW fast reply Thanks!

  4. #4
    Well-Oiled mathman's Avatar
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    You're welcome - with the weather around here I've just been taking it easy inside with the computer this evening.
    David,
    1950 $WD Pickup: There is no apostrophe in Willys...

  5. #5
    Well-Oiled Pivnic's Avatar
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    1957 Willys Trucks COULD BE either 6v or 12v. My 57 Willys Pickup was a 6v, so maybe early 57's were 6v and later 57's were 12v? Pivnic

  6. #6
    Well-Oiled mathman's Avatar
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    Best I've been able to put together, 12v was an option in '57. Not sure when they flip-flopped it to where 6v was the option and 12v standard.
    David,
    1950 $WD Pickup: There is no apostrophe in Willys...

  7. #7
    Well-Oiled Tom1956's Avatar
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    Quote Originally Posted by Pivnic View Post
    1957 Willys Trucks COULD BE either 6v or 12v. My 57 Willys Pickup was a 6v, so maybe early 57's were 6v and later 57's were 12v? Pivnic
    Mine to is 1957 on 6 volts.

  8. #8
    1956/57 were changeover years for many of the American auto manufacturers. Two of the changeovers that most made within these two years were 12v systems, and negative ground. For some reason, it took up until then for them to realize that they were galvanizing their bodies during manufacturing, and removing it with the positive ground electrical systems. Just add a little water, especially with a little road salt added for flavor, and you have a solution for de-plating.

  9. #9
    Moderator johnrb3b's Avatar
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    Guys on the CJ-3B site say that 1957 was the switch to 12V with 6V as an option for a few years after.
    And as far as I know, the 6V systems in the CJs were Negative ground.
    I'd have to check with Ken on the 3B site to confirm.
    1946 CJ-2A - dressed pseudo-military
    1949 - me - no longer older than all my cars
    1954 CJ-3B F-head 4 - - 1957 4x4 Wagon L-head 6 - - 2010 JK 4-door 3.8L V6
    Past Jeeps
    1954 CJ-3B - no tub - - 1959 CJ-3B - no engine
    Past addiction - VW
    '69 bus - - '70 camper - - '84 camper

  10. #10
    Just for giggles, and to stir the pot, 12v actually started in MBs during WWII. ALL Radio Jeeps were 12v. But ALL were also POSITIVE ground. Everything NOT a radio Jeep was 6v. Played hell with the supply chain I'm sure. Tons of 6v parts, and having to stock some 12v voltage regulators, points/condenser, coils, plug wires, starters, etc. for the 12v Jeeps.

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