Electrical problems

When unlocking car with remote the door does close properly and the truck lock keeps unlocking but after 15 mins or so the window closes properly and now the alarm does not work
and also the wipers are not working I think it happens when its cold out could it be that the second battery is at fault??
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Ask at Bimmerforums 8 series board. I may be a General module capacitor problem but I have never experienced or fixed one.