8-way Switch With 4 Outputs...help?

Discussion in 'General Electronics Chat' started by WuNgUn, Feb 22, 2009.

  1. WuNgUn

    Thread Starter New Member

    Nov 20, 2006
    9
    0
    I hope this is the right forum...
    I have a automotive power window switch...it's for two windows, up/down but also 'one-touch' up/down on both windows...
    For example, 1 push is UP, push down further to the second stop, and it's one-touch...

    Problem is, there are only 4 output pins (plus 2 for the power/LED's, which I figured out)...
    The easy part is, each pin-out give a 'signal' for both switches in both up and down...4 pins. However, when one-touch is triggered, that first pin remains active but the opposite direction pin becomes hot as well...
    i.e.
    Drivers window UP is YELLOW
    Drivers express UP is YELLOW + GREEN
    Except, GREEN is also driver DOWN (by itself)

    Put another way;
    Driver UP = YEL
    Express UP = GRN
    Driver DOWN =GRN
    Express DOWN = YELL

    How can I devise a mechanisim to seperate these functions without signalling the another functions at the same time?
    I need something that 'sees' YELL and GRN as up and down independantly, but then, for example, sees the YELL then YELL+GRN and give a seperate signal (to a latch relay)?

    I thought about relays, but the switch goes to ground when active, so it would be 4 relays if I'm not mistaking (2 relays to switch polarity)

    Here is a schematic of the switch...you can see how they cross-connect...
    This is one switch, up/down and express up/express down (2 position)

    http://i258.photobucket.com/albums/hh249/dan2485/Windows Drawings/w d/Poweredwindowsmk15_2.jpg

    http://i258.photobucket.com/albums/hh249/dan2485/Windows Drawings/w d/Poweredwindowsmk15_3.jpg
     
  2. WuNgUn

    Thread Starter New Member

    Nov 20, 2006
    9
    0
    I was shown this as a solution...
    [​IMG]

    I wired it together, using micro relays for simulation purposes, but there is a problem I can't diagnois...here is what the relay looks like, physically...

    [​IMG]

    Both NC and NO contacts on the right bank of relays are showing 12V+ at rest (coils not activated...12V+ applied but no ground 'signal' to the coils)
    Also the NC contacts on the left bank of relays are also showing 12V+

    But the big mystery is, where is this current coming from when everything is at rest??
    Especially the NO terminals on the right-side relays!?
    I can't possibly see how, looking at the schematic, nor physically looking at the setup...

    Anyone have any insight?
    Thanks
     
    Last edited: Feb 26, 2009
  3. WuNgUn

    Thread Starter New Member

    Nov 20, 2006
    9
    0
    bump? Anyone?
     
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