R12 igniton switch spring
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  1. #1
    Fellow Frogger! IThompson's Avatar
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    Default R12 igniton switch spring

    The spring in the ignition switch has gone resulting in the starter motor staying engaged too long. I have to manually remember to twist it back quickly.

    Anyone with a suggestion?

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    - dismantle ignition switch
    - replace ignition switch
    - bypass starter with a button


    Any ideas welcome.

  2. #2
    COL
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    I would just replace the switch.

    You can separate the switch from the barrel, there is two screws that hold the switch to the barrel.

    I have had very little trouble with these switches, my experience is the opposite with the switch not operating the starter.
    Regards Col

    1973 Renault R12 Station Wagon
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  3. #3
    1000+ Posts bowie's Avatar
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    Big... Red.... Button.

    Like Top Gun

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  4. #4
    Fellow Frogger! driven's Avatar
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    Quote Originally Posted by bowie View Post
    Big... Red.... Button.

    Like Top Gun
    Never thought of this.

    I just used a screwdriver under the bonnet on the starter

  5. #5
    Fellow Frogger! Bolla's Avatar
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    I wired my first 12s ignition up to a momentary switch on the dash when the ignition lock failed (choice between beer money and the cost of a replacement ignition and I was at uni at the time) worked a treat. Had the added bonus that when someone tried to steal my car they failed to nut out the revised wiring.

    On a serious note I actually had a redundant momentary switch on the dash that was a standard Renault switch - you may be able to find one of them.

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  6. #6
    Too many posts! JohnW's Avatar
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    I'd not bother to mess with a probably worn out switch, myself. I'd either replace it with a new one (did that with the R8 years ago) or add a nondescript switch, like a Renault rocker switch with a momentary action, and keep the keyed switch for ignition and steering lock functions. On balance, I think I prefer the latter unless you are really concerned about originality.
    JohnW

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  7. #7
    Fellow Frogger! Shoji's Avatar
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    Yesterday I glanced at a replacement ignition switch panel for race/track cars at Jaycar.
    https://www.jaycar.com.au/racing-ign...panel/p/SP0774

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  8. #8
    1000+ Posts REN TIN TIN's Avatar
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    If the return spring isn't working it's the lock barrel that need replacing not the switch (which screws onto the end of the lock).
    New switches are available for not a lot of money.
    I've seen them on Ebay, Amazon, and through the usual suspects like R12 shop etc.
    Used ones are also around but they're an unknown quality and might last 10 years or 10 minutes.
    My 2 cents, replace the switch.

    Cheers
    Ren
    "I cannot help but notice that there is no problem between us that cannot be solved by your departure."

  9. #9
    1000+ Posts REN TIN TIN's Avatar
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    Here you go, on Aliexpress, around eight bucks plus shipping.
    The shipping charge is very high but still you have a brand spanking new switch for less than thirty bucks.
    Not worth the effort of rigging up a bypass.

    https://www.aliexpress.com/premium/r...d=0&isViewCP=y
    "I cannot help but notice that there is no problem between us that cannot be solved by your departure."

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