is your car highly optioned and ports are used up?or they not there at all?look high above fuse block (remove hush panel ) and youll see a white "juction box" ,thats were you can get aux,ign and batt.... put a fuse on the lead you add because these are high amperage circuts.be carefull when testing too.this is where power windows,power seats,etc. get power from fuse block....