Battery drains overnight
Thread Starter
Probation Members
Joined: Feb 2025
Posts: 1
Likes: 0
From: France
My Ride: E61 525D
Model Year: 2004
Battery drains overnight
Hello,
I am having trouble identifying a problem causing my battery to drain. I am suspecting the tailgate microswitch as it seems to be a common issue.
When I close my doors the lights inside the car remain on.
The tailgate window randomly pops open.
The rear wiper doesn't work.
Could these issue be coming from a faulty microswitch ?
I am having trouble identifying a problem causing my battery to drain. I am suspecting the tailgate microswitch as it seems to be a common issue.
When I close my doors the lights inside the car remain on.
The tailgate window randomly pops open.
The rear wiper doesn't work.
Could these issue be coming from a faulty microswitch ?
Super Moderator
Joined: Jul 2011
Posts: 3,952
Likes: 361
From: Augusta, GA
My Ride: 22 BMW 540i xDrive; 05 BMW 530i
Engine: 3.0 B58; 3.0 M54
That would be just a guess. Need to isolate it to know for sure. Unplug or remove fuse to start isolating issues. If not then perform a parasitic drain test to find your issue.
Last edited by donpb; Feb 8, 2025 at 02:31 PM.
New Members
Joined: Aug 2018
Posts: 655
Likes: 73
From: Abbotsford, BC
My Ride: 2009 535xi Touring 6MT, 2019 i3s
Engine: N54
Sounds like you've got wires breaking going into the tailgate. Super common. You can get repair wiring and fix it yourself or hire someone to do it.
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