according to the haynes manual fuse 15 which is a 20amp will kill the central locking control unit, remote control unit, courtesy lights, boot light and electric aeriel, we have found removing fuse 15 only disables the alarm system. the book says fuse 26 should disable the alarm system. (work that one out).
we currently have a problem in which the engine continues to run after the engine is switched off and the key has been removed. Only removing fuse 15 turns the engine off. we have found even with fuse 15 removed the central locking still operates perfectly with the key in the lock, only the alarm and remote key fob is affected.
We are going to try and get a fuse diagram from peugeots because we think the haynes manual is wrong.
Good Luck
Lee Nias, April 2008