I have a 71 Chevelle w/ AM/FM radio. I get nothing through the speakers. I can here the faint sound of music coming through the actual radio but nothing goes to the speakers?? I have all the correct and original wiring and speakers in place. Thanks, for the help.

Found the problem: Bad Speakers

Sometimes a failed output transformer will do this. It will deliver no signal to the speakers, but act as faint speaker itself. AKA "talking transformer".