audi a6 2004 wiring

	Battery		RED		(+)		IGNITION SWITCH HARNESS
	Ignition 1		BLACK		(+)		IGNITION SWITCH HARNESS
	Starter 1		RED / BLACK		(+)		IGNITION SWITCH HARNESS
	All Door Trigger		RED / YELLOW		(-)		IN DRIVER'S PILLAR
	Trunk Trigger		WHITE/ YELLOW		(-)		IN HARNESS FROM TRUNK
	Hood Trigger		GRAY/RED		(-)		IN THE PLUG BELOW WASHER RESERVOIR
	Alarm Disarm		DISARMS WITH UNLOCK
	Alarm Arm		ARMS WITH LOCK
	Parking Lights		GREEN/ GRAY		(+)		AT VEHICLE LIGHT SWITCH

Note on Alarm Disarm wire reads:  A SINGLE PULSE TO THIS WIRE WILL DISARM THE FACTORY ALARM AND UNLOCK JUST THE DRIVER'S DOOR. A SECOND PULSE WILL UNLOCK THE REST OF THE DOORS.

Note on Parking Light wire reads: YOU MUST DIODE ISOLATE THIS WIRE OR THE ACCESSORIES WILL POWER UP WHEN THE PARKING LIGHTS FLASH.

	RF Speaker (-)		BROWN / RED
	LR Speaker (+)		BROWN / WHITE
	LR Speaker (-)		BLUE/WHITE
	RR Speaker (+)		BROWN / RED

I noticed that the harness comes with 2 blue wires.  One of them is an amp turn on wire. The rear speakers may be amplified. The Blue/White wire is the amp turn on wire.  You may have to plug the OEM radio back in and use a volt meter to find the amp turn on wire at the OEM harness.  Then insert the Blue/White wire into the appropriate slot of the Metra harness so it can turn the amp on.

Metra had only the non amplified plug listed for that vehicle.  It does come with the Antenna and Amp Remote wires not inserted into the harness.  I know that they use the same plug for some Benz models as well. I think that the amp remote and the power antenna wires are in different locations per brand of vehicle.  That is why I suggested plugging the OEM radio back in and see where he needs to insert the Blue/White wire in the aftermarket harness.