Hey does anyone know anything about the stock radio in a 1991 dodge ram150? I have one that just simply doesn't work. no buttons work or anything else on it and I'm not sure if it is just the head unit or if it is something inside. i checked the connections in the back of the head unit and they are all tight. any ideas?????? Is there any way to check and see if my speakers are still good I have not heard anything out of them since I have had the truck??????