WTD R8 brake light switch.
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Thread: WTD R8 brake light switch.

  1. #1
    Fellow Frogger!
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    Default WTD R8 brake light switch.

    Hi. Need a new brake light pressure switch for a Renault 8. If youíve got one or know where I can get one (preferably locally) or if theyíre the same as anything more readily abailable, please let me know.

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  2. #2
    1000+ Posts renault8&10's Avatar
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    I know a few people who have installed a micro switch and bypassed the original switch. It activates on the brake pedal shaft.
    Might be an opinion for you?
    KB


  3. #3
    Fellow Frogger!
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    I’ve actually been looking into that a bit tonight to see if it’s an option. I figure any switch that reacts to line pressure will activate later than a switch that reacts to pedal movement. Not my car though, and don’t want to do anything that isn’t a tried and reliable fix.

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    COL
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    You could use a proximity switch, totally sealed up with no moving parts. Ideal for under the floor of an R8

    https://www.aliexpress.com/item/Free...7-d3910a3eb153
    Regards Col

    1973 Renault R12 Station Wagon
    1976 Renault R12 Station Wagon
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  5. #5
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    Quote Originally Posted by COL View Post
    You could use a proximity switch, totally sealed up with no moving parts. Ideal for under the floor of an R8

    https://www.aliexpress.com/item/Free...7-d3910a3eb153
    That's interesting Col. I'll have to buy a couple and play. I see they switch up to 400 mA, so need to activate a relay in turn to switch the lights.

    I have a microswitch actuated inside the car from a bent piece of metal attached to the back of the pedal.

    Regarding the diaphragm switch, they are just fine if newish but over time (decades) the diaphragms seem to stiffen and THEN the brake lights may not come on for light braking. I fitted the micro-switch in part to avoid messing around with the hydraulics to change the switch.

    Cheers
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

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    COL
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    Quote Originally Posted by JohnW View Post
    That's interesting Col. I'll have to buy a couple and play. I see they switch up to 400 mA, so need to activate a relay in turn to switch the lights.

    I have a microswitch actuated inside the car from a bent piece of metal attached to the back of the pedal.

    Regarding the diaphragm switch, they are just fine if newish but over time (decades) the diaphragms seem to stiffen and THEN the brake lights may not come on for light braking. I fitted the micro-switch in part to avoid messing around with the hydraulics to change the switch.

    Cheers
    Yes you will need to use a relay.

    I have bought one to play with for my Alpine but as yet have done nothing with it.
    Regards Col

    1973 Renault R12 Station Wagon
    1976 Renault R12 Station Wagon
    2002 Renault Laguna V6
    1973 Alpine A110

    http://alpine-a110.weebly.com/

  7. #7
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    I just use a normal switch available from any auto store, no relay required. Make a steel L shaped bracket and mount it under the floor pressing onto the back of the pedal arm.

    It worked real good on the R8G, now the Alconi and Floride all have the same tested and proven system.

    Easy to get to and no need to mess about with hydraulics, bleed brakes etc.TRI80B3.jpg
    COL likes this.

  8. #8
    Too many posts! JohnW's Avatar
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    Neat. Good to see you've replaced the old heater hoses....
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

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