Hi
i have a honda civic es cdti 09 plate i have bought reversing sensors to be fitted and i dont now where the reverse light wires are located. Any one have any ideas please?????

 

I'm not familiar with your car, but I'd go into the trunk and find the wires coming off of the backup lights. Note their colors and then follow them backwards until you find what you are looking for. Not familiar with reversing sensors, either, but I'd imagine they just have to be wired into the backup light wires to work properly.
Duane