2007 A4 - Factory Amp

[Trigger200]

I could use some help with my factory amp. I have installed an aftermarket head unit - I have sound in my rear spears & sub but it is really low volume. I believe I have power to the amp remote turn-on wire (red in the picture) but I'm having difficulty identifying what wires are what on the factory amp harness. Is there a direct battery source? I've searched quite a bit and every amp wiring diagram I've found does not match what I have.... I'm hoping someone can identify for me what powers the amp and if there is a separate fuse for the factory amp? I have a Non-Bose system.

Here's what I have...


Amp Connector Photo



Thanks

[Biged243]

The rea and sub is ran off the factory amp and the fronts are off the head unit. You might have the harness for Bose for your aftermarket.

[Trigger200]

The rea and sub is ran off the factory amp and the fronts are off the head unit. You might have the harness for Bose for your aftermarket.

Thanks for the reply Biged243. I understand the rear speakers and sub are ran off the amplifier - I'm having difficulty finding out why my amplifier is not turning on. I've got 12 volts at the main power to the amplifier and I've got power at the white wire at the amplifier which I believe is the remote turn-on for the amp. What I'm struggling with is finding a wiring diagram to match what I actually have at the amplifier.

Not sure if this is the problem or not, but what I believe is the remote turn-on for the amp I only have 10.5 volts; I would expect 12 or closer to it. Maybe I'm not getting enough voltage from my aftermarket head unit to actually turn the amp on? I'm not sure - can anyone help me with this?

[BKLYNAUDI]

http://www.audizine.com/forum/showth...avin-Head-unit