How to hook up a car radio/ cd player to my boat

Question

I'm trying to hook up a extra car radio cd player up to my 14' aluminum boat. i started by cutting out a hole for the radio and speaker in a 2x10 board, now i hooked the white and the white /blk wires to the the one speaker and then the gray and gray /blk wire to the other speaker. i also hooked the red and yellow wire to the poss terminal of the battery and i hooked the blk. ground wire from the radio to the neg term. , and also ran a wire from the back of the radio to the neg term. of the battery .but the problem i am having is i cant get any sound from the radio any suggestion on what to do thanks.

Answer 1

What kind of radio is it?  It's possible that the stereo may not have whats called a Pre-out or any wattage, and that you need an external amp to have it output sound.