Factory Amp location?

[dsio]

I'm trying to wire in my new head unit, but I am unable to figure the wiring out.

I have a pair of wires for left and right going into the harness from the old radio, and then I think those wires are going straight to the fader, but I dont know where they are going after that.

They dont match the wiring code for speakers, so they must be the inputs for the factory amplifier, but I have no idea where the thing is.

Can anyone help me track the bastard down?

Its an 85 318i coupe.

[UNHCLL]

1) Factory amp is located behind the drivers side trunk panel, mounted up and to the left behind where the jack sits.

2) You cant install a HU and wire it up to stock setup. Stock Setup uses a common ground. Run new wires to all 4(8) speaker locations.

[dsio]

I had a feeling that may be the case.

What is the best trick to wiring the speakers? Seams like a bitch to do, especially the front speakers.

[Royal]

I just ran new wire from my new headunit to my speakers. It's not that hard, not fun(hiding the wires is a chore) but is a much better option than trying to use the factory amp IMHO. :P