Cheers, I figured that myself in the end, the reason it wouldn't switch on cos for some reason, theres no current coming from the ignition, so I've joined the memory and ignition wires together and its working now!! Just gotta figure out the speakers now, they're different colours!!!

use a multimeter to find out which wires are which. One should be a permanent live, another an ignition live, and the other is probably the dimmer cable. To determine them:

Permanent live will obviously come up on the multimeter when lights and ignition are off.

Ignition live will register on the multimeter when the ignition is turned on.

The dimmer wire will register on the multimeter when the side/head lights are turned on.

Hope this helps :D

Hi, a friend of mine has just bought a T reg corsa B, and has asked me to fit in an aftermarket stereo as the c*nt who had it b4, has CUT all the wires, so I bought the ISO connectors with bare ends so I can attatch the wires, but the wires from the car loom are different colours to the standard ISO colours (Bloody Vauxhall) the thing is, theres 3 red wires which of course is the ignition wire!! Any1 got any ideas or even better, a wiring diagam! Cheerz!