Radio problems

I still have the stock radio and cd player installed in my 98 clipse. The cd player and the am works fine but the fm doesnt work at all. I remember reading somewhere that a part of the radio is supposed to be under the passengers seat, i think it was the amp. Whatever is supposed to be there is missing. Would this affect it? If not does anyone have any ideas on why it isnt working?

is the antenna plugged into the back of the radio. am uses a internal antenna usually and the external antennais only for fm so the plug probably fell out. i dunno how to get to it on a 2g though search on dsmtuners i saw a thing about how to change the radio on there and it had all the stuff you need to pull apart. basicly u have to take the whole center console out

yeah i took the radio out and made sure everything was connected good. there is a wire sticking out under the passenger side seat. What is supposed to go there?

does it have a metal nipple lookin thing on the end of it? if so, thats your antenna wire, and it gets plugged into the rear of the unit. there's a small circular hole... stick it in there.