I know that it is located on the gearbox, I was having a good look round under the car (with the car just flat on the ground) and I couldn't see it, I need to have a look as my reverse lights don't work (I've checked fuses/ bulbs)  and I think that this is the problem. I have the new reverse switch. I was wondering if anyone has done this and/ or knows where about the switch is on the gearbox and if so if I need the car lifting to get to it.  Thanks  Leo