1994 E36 Coupe - Help with wiring after market mirrors

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  1. 1994 E36 Coupe - Help with wiring after market mirrors 
    #1
    BMW Master
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    Aus318is's Car Details
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    Looked everywhere, so hope someone there can help me. Have a wiring diagram for stock mirrors, but hard to read....

    Have bought after market M3 style mirrors and they are on the car. My problem is wiring three wires into four.

    Have white, green and yellow on the mirrors. White (funny enough is ground).

    Green is right to left

    Yellow is up to down.

    Each harness has a brown - ground connect to white. But have three wires on each side.

    On passenger, have Blue/Black, Blue/White and Blue Green.

    On driver, have Blue/Black, Blue/White and Black/White.

    Help would be very welcome....

    regards to all
     
     

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    You got heated mirror glass on the original mirrors? If so, then I think one of the wires will be for the heating element. Do you have a circuit tester? use the tester to look for power in the wires when you press up/down left/right. You've got the earth connected already, so it only the directional positive feeds left.
     
     

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    DragonLogicX's Car Details
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    Have you considered just swapping out the OEM motors to put into the m3 ones? no need to mess about with the wires then and you could even source some heated mirrors glass to go top if you wanted at a later date.
    Since the reps have motors already, 90% of the time the screw holes are based on the OEM stuff, so it should be a direct bolt swap.

    Good luck either way.

     
     

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    Quote Originally Posted by DragonLogicX View Post
    Have you considered just swapping out the OEM motors to put into the m3 ones? no need to mess about with the wires then and you could even source some heated mirrors glass to go top if you wanted at a later date.
    Since the reps have motors already, 90% of the time the screw holes are based on the OEM stuff, so it should be a direct bolt swap.

    Good luck either way.
    No didn't consider, but have cut the harness now, so only way forward is to work out how they work. When wired as directed by manufacturer, the mirror motors are on all time. Still confused....

    Anyone done a similar conversion??
     
     

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    Dr of BMW gildersol's Avatar
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    Don't think it'll be as easy as checking for power on the wires when you push the buttons. I've seen a few threads on here about aftermarket M3 power mirrors and I've yet to see anyone say they've got them working properly. Thing is, I've never tried these but I notice there are a huge amount of different ones available, all with different amounts/colours of wires.

    The standard mirrors work with only one motor and a solenoid clutch which determines whether the mirror will operate up and down or left and right.
    Whether you're operating the mirror up/down or left/right it's the same motor which operates, just changing polarity as required.

    For example on the passengers side:

    Brown wire is earth
    blue/black wire is +12v during up or down only
    blue/white and blue/green wires change polarity depending on whether you press up/down or left/right

    blue/white wire is also constant +12v when switches are at off position (this is for when heated mirror circuits are used) This may be why your motors are on all the time.



    Do you know if the aftermarket ones use two motors.
     
     

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    thanks Glidersol. I am finding out how the motors work by contacting the seller. I have left out the blue white and connected the Blue Black and Black White/Blue Green to the available Yellow and Green. This means the mirrors aren't on all time, but they still don't go the right way. I think there are two motors connected the top and bottom opposite corners.

    Will keep all posted on how I get on, any further help appreciated.
     
     

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    Dr of BMW gildersol's Avatar
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    Have a look at this document from some mob who sell M3 replicas. In my opinion, you would want the 4 wire, but I'd still want to check the wiring diagram to make sure it would work ok as I haven't read it in detail.
    Attached Files
     
     

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    Cheers Glidersol, I'll have another fiddle.
     
     

  12. same set up as you 
    #9
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    Did you get your mirrors hooked up and working? If so, how did you hook it up? I dont have a tester and dont want to go buy one.


    Thanks!
     
     

  13. After Market M3 mirrors for BMW E36 
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    I have looked into the wiring diagram for the standard single motor mirrors. I believe I have come up with a simple solution for driving the aftermarket dual motor mirrors from the standard switch. I plan to test my idea out this weekend on my 1993 318i, and if it works, I will post a diagram of how I did it.

    I plan to include a relay in the wiring.
     
     

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