308 window switches | FerrariChat

308 window switches

Discussion in '308/328' started by Hans, Dec 13, 2009.

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  1. Hans

    Hans F1 Veteran

    Feb 17, 2006
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    #1 Hans, Dec 13, 2009
    Last edited by a moderator: Sep 7, 2017
    Hi guys,

    the day before I took my Dino to the paintshop (last May - serious withdrawal symptoms here), I fried both my window switches.

    New ones (for GT4) are obtainable at dinoparts.de, but at a price tag - $60 a piece, plus shipping.

    I was planning on putting a bunch of relays in the doors anyway to get some more oomph from the window motors, so this is as good an opportunity as any to sort this stuff.

    Two questions then:

    1: Do we know of a replacement switch that will also work. The miata that I once had, uses very similar switches. And the old BMW's also have something that looks a lot like this.

    2: I don't get the wiring on these. According to the wiring diagram (attached), there should be 4 attachment points for wires, and yet there are 5 wires running from each switch... What's that 5th wire? And which wire is which???

    Thanks guys!

    Hans
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  2. mwr4440

    mwr4440 Five Time F1 World Champ
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    Hans,

    Can you post a pic or two? I MIGHT know of a place ....

    Are you sure the switches are bad AND unrepairable?

    mwr
     
  3. jimangle

    jimangle F1 Rookie

    Nov 5, 2003
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    Not sure, but the fifth wire could be the ground wire.

    Jim
     
  4. Hans

    Hans F1 Veteran

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  5. Hans

    Hans F1 Veteran

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    The ground wire is already one of the four!

    1 = +12V
    2 = GND
    3 = To window motor
    4 = To window motor

    Now, what would be #5 then???
     
  6. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Are you saying that your old switches actually had 5 wires attached, or are you just observing that the replacement switches have places for 5 wires?
     
  7. Hans

    Hans F1 Veteran

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    The old switches also have 5 wires.

    In fact, I seem to recall (it's been several months since I've seen the car) that the center fast-on connectors had multiple wires attached to them...
     
  8. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    That might be a good thing. There are two "internal" connections between poles shown on those schematic symbols -- might be that they are actually done externally so, as you indicated, the wiring arrangement on the harness side might give a clue.
     
  9. robertgarven

    robertgarven F1 Veteran
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  10. Hans

    Hans F1 Veteran

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    Yes Robert, this helps a LOT.

    THANKS!!!
     
  11. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
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    #11 Paul_308, Dec 14, 2009
    Last edited by a moderator: Sep 7, 2017
    Diagram below are the QV 5 pin window switches, also used in several other Ferrari models.

    The earlier 4 pin switches tied battery and ground to the sections together internally. The 5 pin tied positive contacts together internally. There is a 6 pin version which requires all connections to be made externaly. It makes sense that later switches are more readily available than the early 4 pin devices.

    Function of 5 pin switches: 1 & 3 go to window motors, 2 & 4 are ground, 3 goes to the appropriate fuse. If there is any doubt about the numbers, use an ohmmeter to double check the numbers on the switch against it's function.

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