Vauxhall Zafira 1.6 16v X Reg Fuse Panel?

I no longer have the manual for our Vauxhall Zafira. I need to know where to find a list of the fuses and what each one controls. My two rear brake lights are not working although the middle long one is. I have tried replacing the bulbs with ones I know work but that hasn't worked, so it is not the bulbs. Other than the fuse or bulb, what else could cause only those two lights not to work and allow the other rear lights and the middle brake light to work? Thanks for the help.