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Thread: 2 stages rear window defroster switch wiring

  1. #1

    2 stages rear window defroster switch wiring

    hello,

    can someone help me with the wiring for my 2 stage rear window defrosting switch ?
    here is a picture of the switch
    Attachment 598627

    which color on A, B, C or D ?

    missing is the small bulb to light the switch on center, so I have 5 wires to put on ?
    I have 3 brown together, and a black with a grey also together.
    but I think the grey and the black should be separate, but what are the other wires I need ?

    Attachment 598628


    thanks for any help

    frederic Name:  IMG_9611[2].jpg
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  2. #2
    Senior Member NorthernThrux's Avatar
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    See if this post is helpful. https://www.early911sregistry.org/fo...=1#post1029255
    Mine is a '73S. If not, I can pull the switch and take a picture.

    Ravi
    Early 911S Registry # 2395
    1973 Porsche 911S in ivory white 5sp MT
    2015 Porsche Macan S in agate grey 7sp PDK

  3. #3
    hello,

    seen your post, if you can take a full picture would be lovely

    TIA

    fred

  4. #4
    since you have it all apart...you may want to install the rubber grommets that went into the holes in the dash and sealed the switch...wasn't really much of a seal..but it kept the air from coming into the cabin

  5. #5
    Senior Member NorthernThrux's Avatar
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    Quote Originally Posted by carrera79 View Post
    hello,

    seen your post, if you can take a full picture would be lovely

    TIA

    fred
    Apologies, I’ve been doing some travelling. Will take a pic in the next few days.
    Early 911S Registry # 2395
    1973 Porsche 911S in ivory white 5sp MT
    2015 Porsche Macan S in agate grey 7sp PDK

  6. #6

  7. #7
    thanks for help

  8. #8
    Senior Member
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    The letters are a bit confusing but i think:

    A , marked 3 on switch ? - Jumper to C + single black ,from tunnel harness
    B, marked 4 on switch ? - White black (from tunnel harness)
    C, marked 2 on switch ? - See A
    D, marked 1 on switch ? - Double black (from main harness)

    The spade terminal on the bulb holder gets a brown wire (3 x)

  9. #9
    I think it's the right switch. I don't know if the photo will help you much!
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