i've tried searching on here but can't seem to find any diagrams.

what are the colour codes for the wires? at the moment i'm having no luck and have blown a fuse already

Green = battery feed
brown = ground
black/red = ignition feed (not allways present)

the stereo is parralel wired, this means that you cannot separate the 2 wires on each color because if you do so half the dashboard doesn't work!!!

grey and black are the speaker wires, i don't know this for sure as i allways cut these away but i believe grey is + and black is -

Try this post for size if you feel like getting totally confused

http://www.volvo300mania.com/forum-uk/v ... f=5&t=9300

Tom