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Thread: Wiring Guide: 06 WRX Sedan with Auto AC/HVAC

  1. #1
    Mechie3's Avatar
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    Wiring Guide: 06 WRX Sedan with Auto AC/HVAC

    Wiring Delete Guide:

    https://drive.google.com/file/d/0B3e...it?usp=sharing
    Last updated 12-31-2013


    This thread will document all of the connectors in a 2006 WRX Sedan with
    • auto HVAC
    • manual transmission
    • no sunroof
    • no heated wipers
    • no heated seats.


    Please note, the wagon has slightly different wiring in certain areas as does the manual HVAC model (found on the TR model for 2006). Non turbo cars (imprezas) are also slightly different. Specific wire colors sometimes change as do the existence of certain connectors.

    Objective:

    Retain:
    • front door sensors
    • keyless entry
    • interior overhead light
    • trunk light.


    Delete:
    • ABS
    • power steering
    • HVAC
    • rear door sensors
    • other minor systems


    My process:
    I use two colors of tape: Red and Green. Green tape indicates a connector is needed. Red tape indicates a connector is not needed. The blue tape in the pictures is where I identified the connector when I originally removed the harness from the car.

    Layout of Connector Pictures:
    Picture
    Connector name (corresponds to ID in wiring diagram)
    What it connects to (or what it is in the case of harness to harness connectors)
    What to do with it (with optional notes).


    The wiring diagrams are separated by system so wiring junctions or spliced wires do not always appear in a single diagram. Trace each wire to confirm it ends where it should or if it terminates at a junction.

    Wires to keep are not listed (except for optional systems). The chart only lists wires that can be removed.

    This document is best used in conjunction with the 2006 WRX wiring guide.
    http://ken-gilbert.com/wrx/mans/2006_impreza.zip

    How to Read the Document
    The first column
    *: indicates to check the notes
    ?: Indicates I'm not 100% sure it can be deleted
    OPT: indicates an optional delete/keep (example: power mirrors)

    Connector: Name of the connector

    Fully remove: States if the connector can be fully removed (yes)

    Total Pins: Total pin locations on diagram (not necessarily all populated)

    Pin: What pin number this row refers to

    Wire color: Standard Subaru color chart indicating color of wire at that connector at that pin. Capitals indicate new color, lowercase indicates 2 letter color code. Second letter(s) = stripe. example: BOr = Black wire with Orange stripe, RY = red wire yellow stripe.

    Mating connector: ID of mating connector if it fully connects to a different connector

    Function: What it does.

    Notes: Optional info relating to OPT components or if you need to cut the wire at a junction and not fully remove it.

    As always, perform this work at your own risk. I assume no liability for mistakes in this writeup, bad suggestions, or angry significant others as you try to have the smallest harness possible and spend too much time in the garage.


    If you find errors, fixes, or info to add please let me know
    Last edited by Mechie3; 12-31-2013 at 10:56 PM. Reason: Updated guide and reformatted post
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  2. #2
    Mechie3's Avatar
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    R16: Rear Door Switch, RH
    Connects to rear door open/closed switch
    Not needed. Short wires together (permanently closed)


    R19: Third Brake Light
    Connects to interior third brake light on cars without a factory installed wing.
    Remove completely (do not short) or keep to install thrid brake light.


    R20: Trunk Light
    Connects to light inside trunk
    Use to implement trunk light in conjuction with R27 or delete completely (do not short) if no light is desired


    R24: Spoiler Brake Light
    Connects to harness that connects to spoiler thrid brake light. Same function as R19 for cars with a factory spoiler.


    R22: Rear Door Switch, LH
    Same as R16


    R26: Taillight, RH
    Connects to taillight.
    Splice into FFR supplied harness for factory light function.


    R28: Taillight, LH
    Connects to driver taillight
    Same function as R26.
    Last edited by Mechie3; 10-11-2013 at 02:16 PM.
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  3. #3
    Mechie3's Avatar
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    R27: Trunk Open
    Connects to switch in trunk to turn on/off Trunk light in combination with R20.
    May be removed if no trunk light is desired or kept to implement engine bay light (a switch needs to be added)


    R63: License Plate Lights
    Connects to license plate light harness.
    Splice into FFR supplied license plate light harness.


    R65/R17: Rear Defog
    Permanently attached to rear defog coil. Connector ends plug into window mounted defog system.
    Remove with coil (black box)


    R72, Rear RH ABS Sensor
    Connects to harness on hub mounted ABS sensor.
    Delete completely if no ABS is to be used or keep to implement ABS.


    R130: Rear Defog Coil
    Connects rear harness to defog coil. Unplugging this allows easy removal of coil and R65/R17.
    Remove completely and cut back wires, do not short.


    R122: Fuel Pump Module
    Connects rear harness to fuel pump module (relay)
    KEEP THIS!


    R170: Trunk Diode
    Diode plugs directly into the connector. It is part of the trunk light /trunk switch system. Path is power-->trunk light --> diode-->trunk switch-->ground. If the trunk light and switch are deleted, delete this (do not short it out). If you keep the light and switch, keep the diode. The wires may be shortened.
    Last edited by Mechie3; 10-11-2013 at 02:28 PM.
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  4. #4
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    B97: Bulkhead harness
    Connects bulkhead harness to rear harness
    Some wires may be trimmed. More info later.


    B99: Bulkhead harness
    Same function as B97
    (the yellow wire marked here is for the door sensor which can be traced back to it's source then shorted out to eliminate as much wire as possible).


    R1: Rear Harness
    Connects rear harness to bulkhead harness B97
    Some wires can be trimmed. Not sure which ones yet


    R3: Rear Harness
    Connects rear harness to bulkhead harness B99
    Same function as R1.
    Last edited by Mechie3; 10-13-2013 at 10:47 PM.
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  5. #5
    Mechie3's Avatar
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    i51: Sunload Sensor
    Connectos to sensor on top of dash


    i59: Clock
    Connects to clock/airbag indicator light on Dash
    Can delete (also good source for switched and constant 12V supply)


    Power Socket and Light
    4 Pin connects to B119 (Front accessory Power)
    Use to install power socket or delete


    R2: Rear Harness
    Connects to B98, bulkhead harness
    Can delete some (not sure which yet)


    R15: Fuel Tank Harness
    Connects to R57, Fuel Tank Cord


    R50, B90: Bulkhead to Rear Connection
    Intermediate Connector


    R52: Dome Light
    Connects to dome light
    Delete or keep to have interior lighting activated with door.
    Last edited by Mechie3; 10-14-2013 at 12:23 PM.
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  6. #6
    Mechie3's Avatar
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    R56, Map Lights
    Connects to lights above rearview mirror
    Delete or keep for 12V always on power source


    R73: Rear LH ABS Sensor
    Connects to Driver side ABS Sensor in rear
    Delete (or keep if using ABS)


    R97: Antenna Amp
    Connects wiring harness to antenna amplifier
    Delete if not using radio


    R139: Compass mirror
    Connects to compass mirror
    Delete or keep for switched 12V power source


    AB3: Air Bag Module
    Connects to Air Bag Control Module
    Delete


    AB7, AB8: Air Bag Module
    Connects to air bag control module
    Delete


    AB9, R245, AB61, AB64: Driver Seat
    Various Airbag, seat, and buckle sensors under drivers seat
    Delete
    Last edited by Mechie3; 10-14-2013 at 12:30 PM.
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  7. #7
    Mechie3's Avatar
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    AB10: LH Airbag Sensor
    Connects to side sensor for airbag (G sensor?)
    Delete


    AB11: RH Seat Airbag (side airbag)
    Connects to airbag inside passenger seat
    Delete
    Wrong photo here


    AB13: Airbag Harness
    Delete


    AB19: LH Pretensioner
    Attaches to driver side seatbelt pretensioner unit
    Delete


    AB20: RH Pretensioner
    Same as AB19 for passenger
    Delete


    AB21: Steering wheel Airbag
    Delete


    AB63: Belt Tension Sensor
    Delete
    Last edited by Mechie3; 10-18-2013 at 11:40 AM.
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  8. #8
    Mechie3's Avatar
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    Airbag Control Module
    Delete


    Antenna Amplifier
    Delete if not using radio


    B8: Wiper Motor
    Keep if using wiper assembly


    B14: Starter Magnet
    Connects to tab on starter solenoid


    R15, R72: ABS Sensor
    Both connectors look the same with identical wiring
    Delete if not using ABS


    B16: Master Cylinder Connector
    Senses brake fluid level
    Keep this (deleting turns on brake light on gauge cluster)


    B19/B17/B128 (L to R): Rear O2, Speed, Trans
    Connects to harness attached to transmission
    Last edited by Mechie3; 10-14-2013 at 01:18 PM.
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  9. #9
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    B30: Front LH Door Card
    Connects to harness inside driver side door
    Delete or keep some wires if you want to use power mirrors


    B31/AB1: Bulkhead to ABS harness
    Delete


    B36: Bulkhead to auto AC harness
    Connects to i1, auto AC harness
    Delete (not sure if all/some)


    B37: Bulkhead to auto AC Harness
    Connects to i2
    Same as B36


    B40: Data Link Connector (OBDII)
    Keep this to read ECU/use Cobb


    AB4: Passenger airbag
    Delete


    AB12: RH Side Airbag Sensor (G sensor?)
    Delete
    Last edited by Mechie3; 10-14-2013 at 02:34 PM.
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  10. #10
    Mechie3's Avatar
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    Frank 818 would be proud of me though.

    AB60: ABS to Bulkhead wiring
    Delete


    Antenna plugs
    Various wires coming off the antenna amplifier. The banana plug goes into the radio to provide a signal
    Delete if not using the radio (comes off with amp when unplugged)


    B32: Turn Signal


    B50, Blower Fan Relay
    Relay for blower fan on HVAC
    Should be able to delete (need to confirm)


    B51, B271 (blue plugs): Fuse Box plugs


    B65: Stop Light Switch
    Connects to brake pedal (?)
    Last edited by Mechie3; 10-14-2013 at 02:39 PM.
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  11. #11
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    B68: Roll Connector
    Cruise control and horn connect to this
    Keep to use cruise/horn or splice into specific wires to make your own horn/cruise control buttons


    B96: DRL Module
    Module controls DRL function
    Need to confirm entire module can be deleted


    B69: Parking Switch
    Connects to parking light button on top of steering column
    Keep this


    B71: Combination Switch
    Controls high beam, low beam, and dimmer


    B72: Ignition Switch


    B77, B256, B293, HVAC Controls
    Not listed in order. Various inputs to blower/heater core
    Believe you can delete everything


    B91: Fresh/Recirc Actuator
    Connectors to actuator on HVAC system to control fresh/recirc
    Delete
    Last edited by Mechie3; 10-16-2013 at 07:20 PM.
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  12. #12
    Mechie3's Avatar
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    B95: Diode (DRL)
    Not sure if this can be deleted without affecting headlights. Need to confirm


    i22: Hazard Lights
    Connects to dash mounted hazard button.
    Keep this.


    B98: Bulkhead to rear harness
    Connects with R2
    Can delete some wires (not sure which yet)


    B101: RH Front Door Card
    Connects to passenger door card
    Delete this (need to confirm delete all)


    B102/B103: DRL Relay, High beam relay (DRL)
    Not sure if these can be deleted without affecting headlight function.


    B106: Clutch Switch


    B112: Fog Light Diode
    Not sure if this can be deleted. Keep if you want OEM fog operation
    Last edited by Mechie3; 10-14-2013 at 02:51 PM.
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  13. #13
    fasterer and furiouser longislandwrx's Avatar
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    That's one way to get to 2000 posts.

    Awesome post so far.

    Looking at this, makes me want to do my harness diet before pulling it out of the car, one wire at a time and checking for issues.
    Last edited by longislandwrx; 10-11-2013 at 02:57 PM.
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  14. #14
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    B118: CD Player illumination
    12V switched source. Delete or use for other accesories


    B119: Front Accessory Power
    Plugs into previously shown power socket and light
    Delete if not reusing 12V power socket


    B120: Radio
    Can probably delete everything if not installing a stereo. Likely easier to wire up a stereo from scratch anyways.


    B121: Stereo Ground


    B122/B83: Joint Connectors
    Small end connetors located near ECU under some tape
    Leave these.


    B125/B126: Line end connector
    Not sure what these do. I think they might have to do with DRL, but need to confirm


    B134/B135/B136/B137: ECU
    Self Explanatory.
    Some lines can be deleted (lines controlling abs, hvac, etc)
    Last edited by Mechie3; 10-14-2013 at 03:06 PM.
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    B141: Immobilizer
    Connects to immobilizer under dash.
    For use with RFID inside modern Subaru keys


    B142: Immobilizer Antenna
    Self Explanatory


    B176: Keyless Entry Module
    Self Explanatory
    You can probably delete this if you really wanted to. Probably more work than it's worth and is handy to have for arming the factory alarm


    B198: Ground Terminal
    Convenient way to ground multiple wires to a single chassis point


    B200/B61/B100/B108/B62: Bulkhead to Front harness
    Connects bulkhead harness to front harness/fusebox


    B208: Glove Box Light
    Delete


    B243: Security Horn Relay
    Last edited by Mechie3; 10-14-2013 at 03:11 PM.
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    B264: Short Connector
    This is wrapped completely in tape near the inside fuse box. This can be deleted if you short the two wires in the pink connector together.
    FSM calls this red (it's rather pink if you ask me).


    B265: Rear LH Door Card
    Delete all (need to confirm)


    B267: Front LH Door Switch
    Keep if you want door chimes/alarm, short together if you want to eliminate this


    B268: Front RH Door Switch
    Same as R267 for passenger door


    B269: Rear RH Door Card
    Same as B265


    B282: Auto HVAC
    Connects to Auto HVAC module
    Delete all (need to confirm)


    B283: Auto HVAC
    Same as B282
    Last edited by Mechie3; 10-14-2013 at 03:17 PM.
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  17. #17
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    B292: ABS G-Sensor
    Delete


    B301: ABS Module Controller
    Connects to ABS controller built into ABS pump unit


    B309, B47, B46: DBW throttle relay, Main relay, Fuel Pump relay
    Keep all of these


    B315: Throttle Position Sensor
    Connects to DBW throttle pedal


    B370, Ign Starter and Steering Lock


    B422: Starter cut relay
    Believe this cuts power to all non critical electrical items during engine start except starter/ecu


    B427: SRS Airbag Harness
    Delete
    Last edited by Mechie3; 10-14-2013 at 03:22 PM.
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  18. #18
    Mechie3's Avatar
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    i1: Auto AC to bulkhead harness
    Connects to B36
    May be able to delete all (need to confirm)


    i2: Auto AC to bulkhead harness
    Connects to B37
    Same as i1


    i11/i12/i10: Gauge cluster (combination meter in FSM)
    Keep these


    B70: Combination Switch


    B75/B76: Test mode connector
    Keep these, but do not connect them. Only connect them when using test mode (usually done for writing to the ECU).


    B87: HVAC Blower Motor
    Delete or keep for high amperage switchable line via relay


    B107: Cruise Clutch Switch
    Kills cruise if clutch is pressed during CC operation
    Last edited by Mechie3; 10-14-2013 at 03:43 PM.
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    Good job

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    Senior Member Xusia's Avatar
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    Very nice! Thank you.

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    Senior Member Zodiac's Avatar
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    this is definitely going to come in handy, thanks a lot

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    Senior Member AZPete's Avatar
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    Mechie, you are my new best friend! Keep adding stuff please. I've got 2 unopened cardboard boxes of 06 WRX wiring and nightmares. Your work will save me weeks of frustration. Moderator: we have Photo of the Month already but can we add "Member of the Month"?
    Thanks, Mechie. Thanks.
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    A GREAT help to all of us and a GREAT effort Thanks!

    And again THANKS.

    I haven't got to the harness yet...but feel much more confident about it knowing this resource is there.

    fred

  24. #24
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    Can we call you Frank Jr now?
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  25. #25
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    Quote Originally Posted by Wayne Presley View Post
    Can we call you Frank Jr now?
    I am confused about why you are shorting some wires to ground, and simply cutting or eliminating others.

  26. #26
    Mechie3's Avatar
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    Quote Originally Posted by tmoretta View Post
    I am confused about why you are shorting some wires to ground, and simply cutting or eliminating others.
    It depends on the function of what's being deleted and what state it is normally in while driving.

    The rear door open/closed switches are normally closed when the doors are closed. When the doors are open, it triggers the door open light on the gauge cluster, can make some buzzers go off, and if you use the keyless entry to lock it it beeps multiple times and honks the horn. If you just cut these wires, the ECU thinks the door is permanently open. If you short it out, it's the same as permanently closing the door/switch (or taping it closed and letting it dangle, a much less elegant way to go).

    For somethings like lights (trunk light for example), if you short them (ie, remove a switch and connect power to ground) the light will permanently be on with no way to shut it off. In these cases you can cut the wire and insulate the ends so it doesn't short out in the future. Or, you can attempt to fully remove the wire (ie: take pins out of connectors) so that nothing remains and there is no risk of the wire shorting out at some time in the future.

    For things like ABS, they normally have a non steady signal so shorting these out would make the car think the wheels are permanently locked up (I think...) and I'm not sure of the effects of this. Removing the wires gives an error signal and just disables ABS (once pinched an ABS wire killing the signal and all it did was disable ABS until the wire was fixed).
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  27. #27
    Mechie3's Avatar
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    I identified and photographed 135 more connectors today. It'll take some time to upload and post them.
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  28. #28
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    Quote Originally Posted by Mechie3 View Post
    I identified and photographed 135 more connectors today. It'll take some time to upload and post them.
    Also, I am in process of simplifying my harness. Much of it is yellow air bag circuit. Since I will not be using this circuit, can I peel all the yellow wires back to source and eliminate?

  29. #29
    Senior Member C.Plavan's Avatar
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    Quote Originally Posted by Mechie3 View Post
    Frank 818 would be proud of me though.
    That made me laugh!

    I need the harness that goes from the engine/motor connecters to the ECU (and associated wires) Is it one harness?

    Does the harness I need have everything I need to connect a Cobb accessport V3 also?
    Last edited by C.Plavan; 10-14-2013 at 12:05 PM.
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  30. #30
    Mechie3's Avatar
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    Quote Originally Posted by tmoretta View Post
    Also, I am in process of simplifying my harness. Much of it is yellow air bag circuit. Since I will not be using this circuit, can I peel all the yellow wires back to source and eliminate?
    More or less. It gets tricky as sometimes they wrap with yellow, then switch to black, then combine it with another, then split it. Best bet is to find a FSM and get the wiring diagram. The hard part is identifying all the connectors (which I've done here). The easier part is tracing one part to another and cutting it off.

    Quote Originally Posted by C.Plavan View Post
    That made me laugh!

    I need the harness that goes from the engine/motor connecters to the ECU (and associated wires) Is it one harness?

    Does the harness I need have everything I need to connect a Cobb accessport V3 also?
    On my 06 It's multiple. There's the front engine harness that attaches to the bulkhead harness on the driver side but some connectors (02, boost solenoid, MAF, rear 02, speed, trans) are part of the bulkhead harness itself.

    Should be able to connect to a COBB. I'm using a V2. I'm only cutting off things that no longer exist (HVAC, airbags, ABS) and even if I didn't cut them out wouldn't do anythign.
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  31. #31
    Mechie3's Avatar
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    B160: Fog Light Switch
    Connects to OEM fog light switch. Provides power to fog relay and lights up OEM button. Wired such that turning on high beams turns off fogs.
    Delete if not using fogs/OEM fog button or you want fog lights operable at the same time as high beams.


    B281/B280: Body Integrated Module
    Keep this


    B41/B158/B152/B52: Fuse Box
    All connectors on the back on the inside fuse box
    Last edited by Mechie3; 10-14-2013 at 03:47 PM.
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  32. #32
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    F60, F61: Front Engine Wiring Harness


    F6: RH Fog Light


    F126: RH Headlight


    F16: Sub Fan Motor


    F78: Ambient Temp Sensor


    F102: Keyless Buzzer


    F5: Horn
    Last edited by Mechie3; 10-21-2013 at 12:15 PM.
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  33. #33
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    F17: Main Fan Motor (radiator fan)


    F47: Horn


    GB1, GB2: Grounds


    F125: LH Headlight


    F12: LH Foglight


    F79: AC Pressure Switch


    F130, F94: Airpump Ground, ABS Sensor
    Last edited by Mechie3; 10-21-2013 at 12:18 PM.
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  34. #34
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    AB18: LH Front Airbag Sensor


    AB14: LH Airbag sensor to harness


    F40, F41: Fuse and relay box


    F44: Front to bulkhead harness


    F2, F74, F45: Front to bulkhead Harness


    F46: Front to bulkhead wiring harness


    F32, F33: Washer Pump
    Last edited by Mechie3; 10-21-2013 at 12:26 PM.
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  35. #35
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    F68: Main Fuse Box


    F38: Main Fuse Box


    F37: Main Fuse Box


    F36: Main Fuse Box


    F35: Main Fuse Box


    F129: Secondary AC Relay Holder


    F25, F26: Alternator
    Last edited by Mechie3; 10-21-2013 at 12:29 PM.
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  36. #36
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    F24: AC Compressor


    F39: Main Fuse Box
    Last edited by Mechie3; 10-21-2013 at 12:30 PM.
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  37. #37
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    Reserved
    Last edited by Mechie3; 10-21-2013 at 12:30 PM.
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  38. #38
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    Last edited by Mechie3; 10-21-2013 at 12:30 PM.
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  39. #39
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    Edited a bunch of the previously reserved posts. If I get a chance, I'll work on the front harness tonight. I need to move some trees though. Thankfully, the builder told me my property line was 20 feet past where it really is so I get to dig up and move trees I planted 4 years ago. [/sarcasm].

    Once I finish documenting all of the connectors, I'll start tracing what can be cut off and where and do my best to document that. If it becomes too tedious, I may fall off in my documentation. The end goal is to have a set of instructions that anyone with an 06 WRX sedan/autoHVAC/nosunroof/Manualtrans can pick up and follow steps A to Z with minimal thought input.
    Last edited by Mechie3; 10-14-2013 at 03:48 PM.
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  40. #40
    Senior Member flynntuna's Avatar
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    This needs to be a sticky or in the wiki section.
    Thanks. When it comes time to remove the harness from the donor, I'll make sure to slow down,label and take pictures of everything.

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