Power from ignition switch?

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  • newsh
    S2Forum Obsessed
    • Aug 2003
    • 16226
    • Country: United Kingdom

    #1

    Power from ignition switch?

    Is there an Accessory output from the ignition switch on the ABY? I've fitted the stereo that I bought for the coupe and have connected the two 12v feeds separately this time (I was getting a flat battery with the 2 feeds joined toether because of the unit looking for a bluetooth connection when switched off). So this time the permanent one is via the ISO conector and the Acc feed I've taken from the ignition switch. I couldn't find a feed that comes on unless the key is turned all the way to ignition on, I was hoping to find a position half way or one that goes off when you pull the key out. Anyone done this? I've had a trawl though some of the old posts to no avail.

    Thanks

    S2 Coupe 3B Project


    Ur quattro restoration

    S2 Avant

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  • Tonks4x4
    Retired OG Mod
    • Nov 2005
    • 3062
    • Country: United Kingdom

    #2
    If you use any spare pin marked 15 on the bottom of the main fusebox this is the ignition live circuit.
    Audi Nut!!!

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    • newsh
      S2Forum Obsessed
      • Aug 2003
      • 16226
      • Country: United Kingdom

      #3
      I've got a switched live off the black wire on the back of the ign switch, what I would like is an "accessory" live that comes on when you put in the key but dont turn it, or only half turn it. So I can sit in the car with the engine off and listen to the stereo.

      S2 Coupe 3B Project


      Ur quattro restoration

      S2 Avant

      Boost is the new rock and roll!
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      • sam80quattro
        S2Forum Extremist
        • Oct 2006
        • 1496
        • Country: United Kingdom

        #4
        I normally use a switched live from 1 of the switches above the radio, heated screen etc

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        • johne
          S2Forum Extremist
          • Apr 2007
          • 1406
          • Country: United Kingdom

          #5
          Originally posted by newsh
          Is there an Accessory output from the ignition switch on the ABY?
          No there isn't, not that I'm aware of. Fortunately, on my stereo you can press and hold the "On" button with the ignition off and it will turn on.

          John

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          • Nuvo
            S2Forum Possessed
            • Nov 2003
            • 3826

            #6
            From memory, there is a thin red wire on the back of the ignition switch that gives the function you need.

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            • maddagent
              S2Forum Enthusiast
              • Nov 2006
              • 136
              • Home: Northern Ireland

              #7
              yes there is a thin red wire on the back of the ignition that does what you want - When i fitted my becker radio i took my switched 12v from there so the becker stays on until the key is actually removed from the ignition.

              You can turn the car right off but the radio still sees 12v until the key is removed, its spot on.

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              • newsh
                S2Forum Obsessed
                • Aug 2003
                • 16226
                • Country: United Kingdom

                #8
                Thanks, I'll have another look at it today

                Edit: Perfect, works a treat, the thin red wire gives 12V as soon as the key is turned and stays powered up until the key is removed completely.

                Thanks chaps!
                Last edited by newsh; 1 January 2011, 10:29.

                S2 Coupe 3B Project


                Ur quattro restoration

                S2 Avant

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                • ronierogers
                  S2Forum Hobbyist
                  • May 2011
                  • 21
                  • Country: United States

                  #9
                  do you guys have any wiring diagram for audi a2? i just wanna have a reference when something bad happens. thanks. sorry for digging this one. i know it is the red wire but i wanna make sure.lol
                  Last edited by ronierogers; 6 March 2013, 02:32.

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