Hi again tabetha,

My brother(my mechanic, lol) said it was a reverse light switch, I've literally just spoken to a local ford dealer on the phone who say it was a switch used on the box for one year, and shows as a reverse light switch. I haven't actually tested the existing one(transferred from the other box) to see if it works to turn the light on, though it has been fitted into the new box. I think my brother tried to put some sealant around, but had little luck(possibly the leak got worse), the guy on the phone at ford sort of suggested the same thing, as it's not a part needed for me car.