fuse 9 keeps blowing on my peugeot 106 diesel 1997 model?

Fuse 9 30amp = front/rear/wash wipe/ lights on buzzer/ stop lights/ glove box light/ elec windows+ mirrors also battery light wont work with out fuse.

Keeps blowing and cant find a fault, its killed the battery and when cars running and you replace fuse it cuts out.

Need HELP Please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!