2000 celica gts factory amp

i need the wiring of a factory amp in a 2000 celica gts. need to rewire amp back in the car but dont have the fatory plug.i have a 71-7712 rodeo,passport reverse harness to use but i dont know the pin positions in the amp. anybody out there be able to help. thanks in advance! the problem i had with this car was after installing the aftermarket deck. amp bypass is no problem with this car. i did not have the reg. rodeo pasport harness to use so i clipped the plug. got power switch and ground at the amp, then off the reg. harness, then off the column, then at the fuse box and all produced the same thing...with constant and switched connected normally the radio would turn on even if the key was not in the ignition, if reversed the powers it would turn on and off with the key but hold no memory. i swaped the radio twice, wired a new harness and got the same results. my next step is to rewire the factory amp(once i get the pin positions in the amp) and use a prmium sound interface (ecpsi-2). anyone can help with either one. i would like to keep the deck in the car, but if i cant i need to know the wiring at the amp.   thanks again scott woodard MECP certified installer best buy co. store#365 macon ga.go GATORS!!