don't know its stumped me, tried changing wiper stalk on steering column also and still does the same!
i know its a common problem with peugeot 306's this age but the only thing left i can think of its a wiring fault, bad earth or something like that!
also my rear heated screen don't work - no power getting to rear elements!!
no car expert but everything is pointing to wiring fault!
sorry can't be much more help!
rob
July 2007