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Technical Head light switch for a '54 Ford converted to 12v

Discussion in 'The Hokey Ass Message Board' started by 51504bat, Aug 8, 2019.

  1. 51504bat
    Joined: May 22, 2010
    Posts: 1,188

    51504bat
    ALLIANCE MEMBER

    Posted this on the Barn but I thought I'd ask over here as well. I couldn't find anything in the archives but maybe I didn't word the question correctly. That said, Getting ready to completely rewire my '54 Ranch Wagon and convert it to 12 volts. I've read conflicting opinions on using the stock '54 6 volt headlight switch vs. using a 12 volt one from a '56/57. From what I can tell the 12 volt switch will accept the knob assembly from the '54 switch and the 12 volt unit will install with no mods where the 6 volt switch was. C&G said the '54 switch should work fine but I'm a little concerned about how the dash light dimmer rheostat in the 6 volt switch will work with 12 volts. Am I worrying about nothing or should I go with the 12 volt switch?
     
  2. It's all about amps, and the 6 volt switch will see a lower amp load on 12 volts. So no problem!
     
  3. atch
    Joined: Sep 3, 2002
    Posts: 4,250

    atch
    Member

    Just to reinforce what Steve said: Clarence (see avatar) was converted to 12V in 1991. I used the original 1948 headlight switch until 2017, when I replaced it. The old one failed, but not because of voltage or amperage; it was just worn out. The switch was 69 years old and had about a gazillion on/off cycles on it.
     
    51504bat likes this.
  4. morac41
    Joined: Jul 23, 2011
    Posts: 520

    morac41
    Member

    Steve x 2 ...if you are worried use the switch to operate a relay to control the head lights
     
    51504bat and JeffB2 like this.
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  5. The other thing that should be mentioned is the current aftermarket/replacement headlight switches generally aren't as well made as the OEM ones, so if yours is OEM and still working well it'll probably be better quality.
     
  6. I have to agree with the above. I remember doing at least 3, 6 - 12 V conversions using the Ford 6 volt switches and having no problems. As Steve has said, there is less current with 12 volts so a 6 volt switch will handle the load quite well.
     
    51504bat likes this.
  7. JeffB2
    Joined: Dec 18, 2006
    Posts: 7,627

    JeffB2
    Member
    from Phoenix,AZ

    scrap metal 48 and 51504bat like this.
  8. 51504bat
    Joined: May 22, 2010
    Posts: 1,188

    51504bat
    ALLIANCE MEMBER

    Thanks for all the good info.
     
  9. When we rewired our '54 Ranch Wagon I just replaced the headlight switch with a new one, the original knob worked fine.

    I did relocate the placement but the principle is the same.HRP

    [​IMG]
     
    OLSKOOL57 likes this.

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