If you have checked the bulbs, fuses and still no luck there then open the bonnet and look at the transmission housing and you will see a plug called a reversing switch, unscrews and is a five min job to replace it and your lights will then work. Depending on your car you may have to take out the air cleaner element and casing to get to switch if located on the top of transmission. hope this helps, steve
steve, April 2007