Peugeot 407. When I turn off the ignition there is a whirring noise under the bonnet this noise continues and then in the morning the battery is dead. Sometimes warning lights come on stop warning lights. It appears something continues to run while the ignition is off and this runs down the battery have to then jump start the car and this again repeats.
If you disconnect the battery for 10 sec and reconnect it the whirring should stop untill you next turn on.
Under normal conditions the whirring stops after about 5 to 10 seconds.
I thinks its either the diesel pump or the power steering pump that is still getting power.
It could be a sticking / faulty relay that is not releasing.
These relays are found behind the battery to the right of the fusebox under the black cover.