I have just bought an 04 Galaxy with front and rear parking sensors. I have known the car all its life and until recently they have worked. The fault is a little different than others I have read. I do not get any beep or sound when I engage reverse. The switch on the dashboard does not light up. There does not appear to be any sign of life in the entire circuit. I have checked the fuses, according to the owners handbook, they are all ok. Any ideas? Electics has never been my strong point. Thanks in advance Pete