I am not sure if it done something when it was hooked up but it worked perfectly at first the only thing i can think of that was wrong was they had the two radio wires and bot high and low output wire all hooked up. He said it get hot and stopped working so it was unhooked and given to me. i have tried to hook it up correct and know the back lighting or nothing comes on it dont sound the sirens either and when ever i hook the wires up the power wire its self i have comming from the ground gets hot... Any ideas or fixes... PLEASE HELP!!!