ok so ive fitted an after market head unit im my 1999 a3, and the two front speakers work, but the rears dont. i have a sub on the passengers side, but it doesnt have bose written on it. which harness do i buy from www.caraudiodirect.co.uk to get the rear speakers working?

would be really grantful if i could get it sorted

 

There Should be a small yellow plug with four wires .First wire is the one channel ,seccond wire (two wires is your common ) Third wire is the second cannel.

The last wire is in the seccond row of the connector (in the middle) tis is your "Rem" wire that switches your Amp.


Cut the plug and coonect to your CD loaders wires (split the common wires as your CD changer has two wires per channel.


Your system should work fine now.