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Power antenna fog switch bypass mod

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    Power antenna fog switch bypass mod

    In my experience it seems alot of folks just don't listen to radio stations as much anymore. I for one have listened to the radio in my car once or twice in 30+ drives.. Seems like you're just wearing the power antenna out by needlessly lifting and lowering every time the head unit is turned on or off.

    Well it turns out it's actually very simple to insert a fog switch to manually disable the power antenna function.

    When the added fog switch is off it disconnects the white wire going from the head unit to the power antenna, so when the radio is on the antenna stays down. When you want to listen to a radio station you push the fog switch on and the power antenna works normally. Just turn it off again and the antenna retracts.

    The fog switch works well for most folks that have an empty switch spot above the HVAC panel - pic below shows the antenna bypass switch on the left



    Otherwise or you can use a small square switch from an E30 sedan instead and mount that on the console (hat tip to Levent at Gutenparts for the square switch idea).

    If you have the premium amp / BMW Sound System the wiring is slightly more involved, because the same white wire to the head unit feeds two white wires going to the power antenna and the premium amp in the trunk. You have to experiment a bit and find out which of the white wires is for the amp (leave that one connected to the head unit) and which one is for the power antenna (insert the switch on that one).

    By "insert the switch" I mean connect the white wire from the antenna to it. Then connect another piece of white wire between the switch and the radio.

    It's easier to see how to wire with BMW sound system if you have pics. Here's a schematic view. you insert the switch where the red XXXXs are.

    Just keep in mind the short line from C219 to C233 in the schematic is actually between the trunk and the radio opening lol. What you need to do is find where the white wire from C219 plugs into a clear connector in the radio opening - that's the C233 connector.

    Insert the switch there - but again make sure you're not cutting the wrong white wire! . It's actually easy to screw it up unfortunately so get yourself a meter and be sure. If you picked the right spot, when you turn the radio on the amp will stay on and the antenna will be disabled.

    I will be producing these at some point soon and make them available to the community
    Last edited by bradnic; 04-26-2019, 12:31 PM.
    I BUY/SELL REFURBISHED CM5907s & CM5908s

    HOWTOs:
    DB vert plastic bumpers
    OEM Keys
    MTech1 docs

    88 ix Lach/Card
    91 ic Calypso 3.1
    86 Cosmo 2.7

    OEM+ or bust!


    reelizmpro: I will always be an e30 guy.. I still do all of my own labor
    TrentW: There's just something so right about a well-built M20 in an E30
    e30m3s54turbo: I save my money for tuner parts.

    #2
    I did that same thing but with a window breaker switch. Didn't know the fog light switch would work or fit in the center dash location. I like it!


    Sent from my smart phone using Tapatalk
    R135 /// 1990 Alpinweiß II 325is
    └┼┼┘ /// 1993 Black/Black Convertible (sold)
    ..24

    Comment


      #3
      That’s really sweet! How did you do the stencil?
      I BUY/SELL REFURBISHED CM5907s & CM5908s

      HOWTOs:
      DB vert plastic bumpers
      OEM Keys
      MTech1 docs

      88 ix Lach/Card
      91 ic Calypso 3.1
      86 Cosmo 2.7

      OEM+ or bust!


      reelizmpro: I will always be an e30 guy.. I still do all of my own labor
      TrentW: There's just something so right about a well-built M20 in an E30
      e30m3s54turbo: I save my money for tuner parts.

      Comment


        #4
        Originally posted by bradnic View Post
        That’s really sweet! How did you do the stencil?
        A lady at work has a special printer that makes stickers. The plan was to put the antenna sticker on the button, but it wasn't sticky enough to hold. I got smart and stuck the stencil on the button and painted the antenna image on it instead. I have an envelope full of the stickers, including 3 different designs. I could send you some. Just PM me.
        R135 /// 1990 Alpinweiß II 325is
        └┼┼┘ /// 1993 Black/Black Convertible (sold)
        ..24

        Comment


          #5
          Love this mod and love the stencil idea for a blank button. PM Sent!
          Albie

          '86 325e Zinnoberrot /// '02 325ci Schwarz II /// '18 M4 Azurite Black Metallic ///

          Albie325 Build Thread | Albie325 Feedback | Albie's M4 European Delivery

          Comment


            #6
            Responded to PM. Dont have any more unfortunately.

            Sent from my smart phone using Tapatalk
            R135 /// 1990 Alpinweiß II 325is
            └┼┼┘ /// 1993 Black/Black Convertible (sold)
            ..24

            Comment


              #7
              I did the same thing, but used the sedan rear window "child lock" button and placed it in the factory location on the center console near the window switches. It's kinda strange to have that button in a coupe, but nice to be able to control the antenna.
              sigpic
              1987 - 325i Convertible Delphin Auto [SOLD], 325i Convertible Delphin Manual [SOLD]
              1989 - 325i Convertible Bronzit m30b35 swapped [SCRAPPED], 325i Sedan Alpine Auto[DD]
              1991 - 325i Coupe Laguna Manual [Project], 535i Sedan Alpine [SCRAPPED]

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                #8
                I did it by replacing my fader switch with a window lock switch.
                Deck Lid and soft top Shocks on hand

                Seat shocks on hand for immediate shipment
                https://www.r3vlimited.com/board/sho...86#post4944786
                Alice the Time Capsule
                http://www.r3vlimited.com/board/showthread.php?t=360504
                87 Zinno Cabrio barn find 98k and still smells like a barn. Build thread http://www.r3vlimited.com/board/show...20#post3455220

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                  #9
                  This is an awesome mod!

                  On my old Sony deck, it would only extend the antenna when I used the radio, not CD's etc. But with the Conti deck, it extends the antenna as soon as there's power to the radio (annoying!).
                  If it's got tits or tires, it's gonna cost ya!

                  Comment


                    #10
                    I did that but put a garage door opener behind the switch.

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