If it's original equipment, the "speaker" in a little round, black plastic "cap"looking thing with a hole in the top. Should be on the driver's side fender in the P/S pump reservior area. Mine was wrapper in a thin strip of grey colored foam. It doesn't look like much but it put out a lot of sound. You could have water, mud or other garbage in it. If you find that it is the speaker, I think mine is still on th fender. I could cut it off of the harness and send it to ya, I have an aftermarket system now.