Here goes, The car doesn't start. It seems that anything that needs the ignition switch to work doesn't work now. For example, the aircon, windows and ICC don't work either, but the interio lights, central locking and alarm do work. The light was earthed properly, and also connected to the powertrain control module. The wire I connected to was located under the steering column, near the base of the bottom piece of trim that's fits on the underside of the steering column. It was the second wire that I had tried, the first one which appeared to be switched 12v didn't work (well the shift light didn't work). The car started OK after trying the first wire. The fuses all seem to be OK. I've checked the ones in the fuse box next to the battery, I don't know of anywhere else to look. Thanks for helping out.