...the ignition wire i mentioned hooking it to first is the same ignition wire that goes to the head unit to turn it on...but instead of it going to only the headunit you could run another wire that would bypass the HU and take it straight to the amp...but i honestly don't think the remote wire is your problem simon...i'd make sure you really looked over everything else before you did that, if you aren't sure then just take it somewhere...certianlly don't want to catch your car on fire trying to be cheap...but i don't know how familiar you are with what you're working with and all...