I got a headunit off ebay and it's some american thing. I got it cause I wanted bluetooth handsfree through my stereo and also so I could use an SD card or USB key for music.
It came with a connector that plugs into the headunit and the comes out to bare wire. So I chopped the connector off the end of an old harness and joined it onto the cable for the headunit. It all seems to be working except the headunit doesn't light up with the headlights.
Does anyone know of a "map" of the connector on the astra and which wire does which? I know the speakers but it's the rest I'm after like the "remote" for attaching to a sub etc.