I bought a sub woofer with a built in amp yesterday and instead of waiting to get it fitted properly my dad volunteered to try and fit it for me, he messed around with a few wires round the back of the headunit and disconnected the battery and loads of the electrics won't work anymore such as the power steering, stereo, windows, indicators etc.. anyone know what the fault could be and how much it would be to get fixed?
Cheers.
Cheers.