R53 Pass. Heated Mirror not working

Discussion in '1st Generation: 2002–06 R50, R53 & 2004–08 R52' started by o2sys, Sep 3, 2019.

  1. o2sys

    o2sys Active Member

    May 20, 2019
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    Hasn't worked since I bought it. Thinking it was just the glass so got a replacement and still nothing.

    The driver's side works and is warm to the touch but pass. stays cold.

    Any leads on what to look for?


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  2. Dave.0

    Dave.0 Helix & RMW Powered
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    May 4, 2009
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    When you have the mirror off make sure the two wire connections are good.
     
  3. o2sys

    o2sys Active Member

    May 20, 2019
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    Yeah seems good, cleaned the connection terminals as well.


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  4. 00Mini

    00Mini Well-Known Member

    Feb 24, 2013
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    A wiring diagram, your trusty voltmeter, and time. Wiring / power problems can sometimes be easy but most times very humbling. Good luck with your quest.
     
  5. Crashton

    Crashton Club Coordinator

    Jun 4, 2009
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    Even a humble homemade test light can show you if you have power at those connections.

    I wonder if it is a broken wire in the loom that goes from the car to the door. Lots of flexing going on there.

    Good luck with your search. Maybe it is a Lucas mirror. ;)
     
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  6. Sully

    Sully Administrator
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    Agreed - first see if you are getting power to the mirror. Start with a test light if you have one or a voltmeter. If so, I would then look at where it goes from the mirror into the door. Check to see if the wire has rubbed and is shorting. Then check the wire between the door and body. That would be where the wire flex's most. That is where I would start. Actually there maybe (Probably is) a fast connect inside the door so you can take the mirror off in one piece. If so, check that connection.
     
  7. o2sys

    o2sys Active Member

    May 20, 2019
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    Couldn't read a voltage on the connection. Also don't think that there is a positive and negative as it seems to not have an orientation. Both wires are back.




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  8. MCS02

    MCS02 Moderator
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    Have you tried putting the negative lead from your volt meter on a ground point on the car then use the positive to che the plug?
     
  9. rkw

    rkw Well-Known Member

    May 7, 2009
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    #9 rkw, Sep 7, 2019
    Last edited: Sep 7, 2019
    Orientation isn't necessary for a resistive heating element (it will work if you plug it in either way). Even if the wires aren't marked, certainly one of them is positive and the other is negative.

    Here's the wiring diagram. The circuit is very simple:
    https://www.newtis.info/tisv2/a/en/r53-cooper-s-hat/wiring-functional-info/body/seat-mirror-function/exterior-mirror-passenger-s-side/mirror-heating-passenger-s-side/qeJvirf

    If it isn't working, the connection to power or ground is broken somewhere. A good place to check is at the connector by the door hinge. It will tell you if the signal is good up to that point.
    The connector is X256 in the wiring diagram. Pin 1 is power; pin 19 is ground.
    https://www.newtis.info/tisv2/a/en/r53-cooper-s-hat/UvKyIgm
    https://www.newtis.info/tisv2/a/en/r53-cooper-s-hat/1VnXmGZsdR
     

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