I've just bought an astra sport, it was in a bit of a state but I've managed to get it sorted and through its MOT but there's a couple of things I haven't managed to sort. Firstly, the guy who had it last hard wired an amp into the battery terminal, so I've got rid of that and now the speakers are sounding awful! They're making a really bad crackling sound even on low volume. Any idea what it could be?
I also want to wire up the steering wheel stereo controls but I don't really like messing with electrics, is it easy to do?