hey im trying to run to amplifiers in my car. i ran all the wires correct for both amps. i bridged the front speakers behind the radio with the rear ones. but when i tried turning it on and it sounds like it doesnt have any signal... i wanna know if i did it right. front right + with rear right +, and front right - with rear right -. and the same thing in the other side... i wanna know if thats the correct way of running it.. need help asap plz.. im goin crazy lol