SnoopyBQ

iTrader: (2)

I have a 2000 LS400 and the subwoofer isn't working. I think the pervious owner put in an amp and disabled the stock subwoofer but I'm not sure. There are 2 cables that look like audio cables and one that looks like a phone jack in the trunk. Is there anything to connect some stuff to make the stock subwoofer work again? I know nothing about aftermarket audio please help. Really want the subwoofer to work. Thanks