Results 1 to 7 of 7

Thread: anyone try running 6v fog lamps on a 12v system?

  1. #1
    PCaricous Fanaticous G50911's Avatar
    Join Date
    Jul 2014
    Location
    SF Bay Area
    Posts
    136

    anyone try running 6v fog lamps on a 12v system?

    i picked up a pair of NOS hella 128's but they're 6v. my 67 is a 12v system and i'm wondering if anyone did this conversion? i read somewhere you can put in 12v bulbs but also vaguely remember i need a resistor or something to make it work. anyone do this? or can anyone chime in with suggestions?
    Last edited by G50911; 02-28-2022 at 10:36 AM.
    1967 911 - #308439
    1971 911 - 3.6 hotrod aka Vader
    1989 911 - Carrera Cabriolet

  2. #2
    Senior Member
    Join Date
    Oct 2014
    Location
    near Champaign, Illinois
    Posts
    174
    I have not done this on a Porsche, but I did do it on my Willys Army Jeep.
    The lights were incredibly bright for about an hour before they both burned out. I'm not saying this same thing will happen to your Hella fogs, but it's possible.
    I am certain other guys will know more.
    Jay
    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1962 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
    2018 M-B/AMG GLE 43 'Wife's Car'

  3. #3
    Righteous Indignation 70SATMan's Avatar
    Join Date
    Jul 2003
    Location
    Santa Cruz, CA
    Posts
    3,705
    Usually it's driven by the capability of the bulb and if you can source the correct 12V bulb for the reflector base then, I see no reason whey you'd need to do anything else.
    Michael
    “Electricity is really just organized lightning”

    -Dusty 70S Coupe
    -S Registry #586

  4. #4
    ^^^^^ my thoughts as well
    Peter Kane

    '72 911S Targa
    Message Board Co-Moderator - Early 911S Registry #100

  5. #5
    Senior Member moito's Avatar
    Join Date
    May 2013
    Location
    AUSTRIA (tu felix)
    Posts
    6,131
    if you use 12V bulbs you are fine..nothing else needed

  6. #6
    PCaricous Fanaticous G50911's Avatar
    Join Date
    Jul 2014
    Location
    SF Bay Area
    Posts
    136
    thanks for confirming and feedback guys. i’ll pick up some 12v bulbs and maybe a relay.
    1967 911 - #308439
    1971 911 - 3.6 hotrod aka Vader
    1989 911 - Carrera Cabriolet

  7. #7
    Senior Member
    Join Date
    Dec 2008
    Location
    Black Mountain, NC
    Posts
    536
    Do the relay, it was in place on factory fog set up, while you are at it add headlight relays to pull more power (amps) out of the headlight switch for longer life and safety.

    Regards

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Message Board Disclaimer and Terms of Use
This is a public forum. Messages posted here can be viewed by the public. The Early 911S Registry is not responsible for messages posted in its online forums, and any message will express the views of the author and not the Early 911S Registry. Use of online forums shall constitute the agreement of the user not to post anything of religious or political content, false and defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, or otherwise to violate the law and the further agreement of the user to be solely responsible for and hold the Early 911S Registry harmless in the event of any claim based on their message. Any viewer who finds a message objectionable should contact us immediately by email. The Early 911S Registry has the ability to remove objectionable messages and we will make every effort to do so, within a reasonable time frame, if we determine that removal is necessary.