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Posts posted by AlpineLegacy06
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Cool - thanks! I copied/pasted into a word doc for reference. Hope you don't mind
Go ahead, this is 4 u guys.
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Hey guys, this is all the wiring information for 2005+ Subaru Legacy 2.5i/Limited/GT models for those looking to do any electrical mods.
If you are installing a remote start system, you would need a bypass (DEI 556UW), this bypass would require you to sacrifice one of your keys in order for remote start to work. I highly recommend having a professional technician work on any electrical component in your car, if precautions are not taken your car could be left incapacitated. If you need any help, I'm an install technician and be glad to answer your questions.
Wiring diagram for installing alarms, remote starts, keyless entry, hardwiring radar detectors, etc.:
Key:
Ignition harness = bundle of thick gauged wires running from the ignition coil to the BCM
BIU = Body Integrated Unit, black box located to the right of the steering column with 3 plugs coming out of it
(+) or (-) = Indicate the pulse of the wire, + means it's positive with 12volts, - means it's negative with ground
ECM = Electronic Control Module, silver box located behind the glove box
Note: When tapping onto wires, make sure you use a multimeter to check to see if you have the right wire.
12volts (+) white (ignition harness)
Starter (+) white/black (ignition harness)
Ignition (+) green (ignition harness)
2nd Ignition (+) blue (ignition harness)
Accessory (+) yellow (ignition harness)
Keysense (+) black/white (ignition harness or BIU, 28 pin plug, pin 7)
Power Lock (-) brown/white (BIU, 35 pin plug, pin 15)
Power Unlock (-) brown/black (BIU, 35 pin plug, pin 29)
Lock Motor (5-wire) lt green/yellow (BIU, 35 pin plug, pin 7)
Unlock Motor (5-wire) red/green to lt green (BIU, 35 pin plug, pin 23)
Parking Lights (+) orange (steering column)
Parking Lights (-) black/white (lighting switch)
Hazards (-) green to purple/black (turn signal and hazard module)
Turn Signal(L) (+) blue/yellow (turn signal and hazard module)
Turn Signal ® (+) red/yellow (turn signal and hazard module)
Reverse Light (+) brown/yellow (passenger kick panel, rear harness)
Door Trigger (-) (BIU, 35 pin plug):LF - blue/white (pin 19)
RF - blue/orange (pin 32)
LR - yellow (pin 31)
RR - white/red (pin 18)
Note: Use All four wires and diode isolate each.
Dome Supervision (-) brown (BIU, 30 pin plug, pin 3)
Trunk Pin (-) lt green/black (BIU, 35 pin plug, pin 17)
Trunk Release (5-wire) white/black (BIU, 35 pin plug, pin 22)
Factory Alarm Arm (-) brown (BIU, 35 pin plug, pin 3)
Factory Alarm Disarm (-) yellow/red (BIU, 35 pin plug, pin 12)
Tachometer (AC) (ECM or gauge cluster):
2.5i/Limited - pink to red/white (35 pin plug, pin 22)
GT - pink to red/white (34 pin plug, pin 23)
Note: Can also be found under the hood at the fuel injector plugs, the wire that is not blue/black, red, or yellow/blue out of 2 wires on each plug.
Brake Wire (+) brown/white (brake pedal switch)
Parking Brake (-) gray (handle or driver's kick panel, rear harness)
Horn Trigger (-) red to red/white (BIU, 30 pin plug, pin 11)
Speed Sense (AC) green/black (ABS control module or gauge cluster)
Wiring Diagram for installing an aftermarket headunit, 4ch/2ch/mono amplifier, etc.:
Note: All wires are located at the radio harness, it's the white plug behind the radio.
12volts (+) blue/red
Ground (-) black
Ignition (+) yellow/red
Illumination (+) purple
Power Antenna (+) yellow/black
LF (+) brown/white
LF (-) green
RF (+) red/yellow
RF (-) white/black
LR (+) white/red
LR (-) red/black
RR (+) blue/yellow
RR (-) red/white
Complete Legacy Wiring Info
in Interior/Audio
Posted
It doesn't really disable the immobilizer system. It actually exploits it by having the donkey kong subaru key inside the bypass, thus, the cylinder thinks that the key is in the ignition. The bypass sends a signal from the chip inside the key to a wire ring that wraps around the ignition coil. Basically, the bypass imitates the key so the car thinks the key is starting it up, that's all.