2004 Peugeot 307 2.0 hdi 110 Electrical problems

Peugeot 307 Problem
The Problem
Fixes: 1
Electrical problems
Feb 6, 2017 (3 years ago)
Hi all, first post here, the guy who helps me with mechanics is usually good but is stumped here (he's checked computer, no errors showing,and suggested a new battery might sort it, which i forked out for and it hasnt)
The problems are all electrical which began with:
1: the car has mirrors which close in when its locked, and open when the igniotion is turned on, the drivers side one is very finikety, more often than not it doesnt open, and i have to lock and unlock with the remote,then turn the key in ignition just to the point where the starter would engage, before the mirror opens.
2:the drivers door window often winds down when i press the up switch, and goes right to the bottom before it will wind back up.
3: about 2 weeks or so after the new battery was fitted, the same problems this was supposed to cure returned, those being - when getting in the car first of all the center display reads 'ecomony mode' im aware that this means the battery is low so not all the electrics will work, although the car does start and the message then disappears but once moving the center display then keeps flashing an immage of a car (like the door open image but with the bonnet area lit up rather than an open door) once that begins happening the alarm goes off within a few minutes of locking the car.
OK, thats a lot to say on a first post, im hoping somebody here with considerably more knowledge/experience thyan me can point me in the right direction though (nice guy, and generally good as my mechanic is, it seems electrical issues arent his strong point though) many thanks in advance!

Car details
Car: Peugeot 307
Variant: 2.0 hdi 110
Model Year: 2004
Category: Electrics, ECU, Warnings & Lights

Recalls: Peugeot 307 Recalls
More: Peugeot 307 Problems
Parts mentioned in this problem
Replies and solutions
Fixes: 1,862
Feb 7, 2017 (3 years ago)
Get your mechanic to check for parasitic battery drain when the car is off.
An amp meter in series between the battery neg post and ground will show up a reading.
Fixes: 1,667
Feb 7, 2017 (3 years ago)
the display is telling you the bonnet is open so I would imagine the bonnet switch is faulty or disconnected as for the window you probably need a new window ecu(motor) and its probably the mirror motor at fault
Fixes: 1
Feb 7, 2017 (3 years ago)
Thank you both 1/4 Drive and Paulieone, both suggestions are very helpful and much appreciated :-)
Fixes: 12,347
Feb 7, 2017 (3 years ago)
Wouldn't go wrong to get alternator output load tested .
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