can anyone tell me what i have to do to hook up an aftermarket radio ....the car has an Mach 460 system but some one cut some of the plugs off the radio....all i want to do is use the stock wires but i cant get the speakers to pop with any of the wires in the dash.... the car had a aftermarket radio in it when i got it but was not able to get any sound so i un hooked all the wires and wany to start over.....it is like the amp will not let the sound go through it .....the car is an 94 gt with the 460 system.......all im looking for is the speaker wires...i can get the power and the ground......any help will be great....