install after market radio

i tried to install an after market cd player in my 97 concorde but when i did all the wiring it lights up but there is no sound anyone know wat might be wrong?
thanxs

if you have a factory amp, you've got to make sure it's wired along with that or else you'll never get any sound.

Did you use an aftermarket wiring kit to install it? If so, you probably have an option of buying one for an infiniti system and one without. I can't remember, but I think the non-infinity setup isn't amplified, so it might bypass the amplifier if you do have an infiniti setup. In that case, you get no sound.