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Thread: Power or Ground ? windshield wiper defrost

  1. #1
    Join Date
    May 2013
    Location
    Canada
    Posts
    1,512
    My Cars
    1990/02 BMW 735iA M30B35

    Post P

    H
    Last edited by Annddrriy; 03-03-2019 at 01:26 AM.

  2. #2
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    wiring diagram I posted in your other thread https://www.bimmerforums.com/forum/s...ilter-fit-side

    IHKA control module with the 4 plugs, next to the heater sword, here is the pinout

    white connector X610 'A'
    1-4 stepper motor fond area
    5 heater sword
    6 aux fan
    7 rear window heater relais
    8 climate control relais
    10 NC
    11 NC
    12+F20 (30)
    13+F20 (30)
    14 - 17 stepper motors for air distribution (recirculation)
    18 light switch LED
    19 light switch LED
    20 TXD
    21 water valve left side
    22 aux water pump relais K8
    23 water valve right side
    24 front window heating relais K8 , K8 connector X59 relay is in front/engine bay fuse box = front defogger/water pump relay, see page 0660-00 http://shark.armchair.mb.ca/~dave/BMW/e32/e32_90.pdf
    25+F20 (30)
    26+F20 (30)

    Blue connector X613 "C"

    Pins are in such way
    13 up to 1
    26 to 14

    1= ground
    2=ground
    3= NC
    4=temp feeler driver side
    5= potentiometer blower motor
    6= temp feeler in engine bay
    7=outer temperature feeler
    8= potentiometer temperature driver side
    9=NC
    10+,11+, for stepper motors
    12+F21 (15)
    13+ F21 (15)
    14= ground
    15=ground
    16= potentiometer+ feeler ground
    17= potentiometer flappers
    18 temp feeler left
    19 starter (50)
    20=potentiometer+feed
    21 temp feeler inside
    22 temp feeler right side
    23+ for stepper motors
    24+for stepper motors
    25+26 = F21 (15)
    26+ F21 (15)


    green X611 „B“

    1 to pin 14,15,16
    2,3,4,5 mixing flap motor left
    6,7,8,9 fresh air stepper motor outside
    10 NC
    11 NC
    12 NC
    13 NC
    14, 15,16 with pin 1 legroom stepper motor left
    17, 18, 19, 20 defrost flap stepper motor
    21, 22, 23 fresh air stepper motor left
    25 NC
    26 NC

    yellow connector 614 „D“

    1,2,3,4 legroom stepper motor right
    5 MPX button
    6 MPX button left
    7 MPX defrost
    8 MPX button right
    9 speed signal
    10 RDX
    11 button rear window defogger/defroster
    12 MPX button recirculation
    13 MPX button aircon
    14, 15, 16, 17 fresh air stepper motor right
    18, 19, 20, 21 mixing flap stepper motor right
    22 NC
    23 NC
    24 NC
    25 NC
    26 NC

    The connectors are:
    13 12 11 10 9 8 7 6 5 4 3 2 1
    26 25 24 23 22 21 20 19 18 17 16 15 14

    See the connectors, they are marked with small numbers outside.

    the SWORD has a 5 pin connector

    Pin 1 connector for the potentiometer for speed regulation at the control panel.
    Pin 2 power supply
    Pin 3: the relay get's contact when the blower fan potentiometer is adjusted, 12 volts come on.
    Pin 4 is ground
    Pin 5 the cable/wire from the blower fan.

    I only worked once on the front windshield heater, found out that the connector left side bottom of the windshield was not connected, difficult to find, but check that first, here copied from Johan's site:
    These are the terminals for the window heating, one at each side. It was just a wire and the terminal of the old shield has to be used: http://bmwe32.masscom.net/sean750/wi...ld/Image30.jpg
    http://bmwe32.masscom.net/sean750/wi...ld/Image50.jpg
    Connecting the lower window heater: http://bmwe32.masscom.net/sean750/wi...ld/Image86.jpg

    indow heat element:
    The lower part of the windshield in the area of ​​the windscreen wiper blades is electrically heated to prevent the wiper blades from freezing onto the windshield. Heating is switched on at temperatures below 5 degrees Celsius and switched off at over 8 degrees Celsius. The control of this is done automatically by the climate control unit via the outside temperature sensor of the automatic climate control system. The control of the windscreen heating takes place via a relay in the power distributor. Control of the relay from the control unit is on the white plug, pin 24, cable BLUE / BROWN. The windscreen heater is not working in cycles.

    See the diagrams in this link , section 5.7 and 5.8 http://www.e38.org/e32/klimaautomatik.pdf
    Last edited by shogun; 02-07-2019 at 11:24 PM.
    Shogun tricks and tips for the E32 series are HERE!

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