Oh ok. Thanks guys. Just find a bit of exposed metal or sand back some paint? I heard that the earth wire has to be as fat as the power wire..is that true? .
The existing earth on the current amp is tacked on to where the head unit is getting an earth from (In around near the headunit there was a bit of metal the earth was bolted to. Should I bolt to this and run fatter cable to amp?
Good call on the rcas - I had checked for switch but didn't appear to be one...maybe get som splitters