E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Thread Tools Search this Thread Rate Thread Display Modes
Old 05-18-2015, 08:06 PM   #1
Registered User
Join Date: Dec 2013
Location: Ohio
Posts: 2
My Ride: 2004 M3 Coupe
Question: Parasitic drain, fuse 49?

Hey guys, car has been dying at night, when i leave the battery hooked up the driver side window slowly goes down over time. I checked the fuses and saw fuse 49 was creating the drain, which controls: Central Locking System, Anti-Theft System, and front window lifts.

I'm wondering what is actually causing the drain? Would it be the window regulator if the window slowly drops? There are no issues putting the window up or down, no noises, regular speed.

Any help would be greatly appreciated, thanks.

Car is an 04 m3 btw.
McGrady is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 05-21-2015, 10:29 PM   #2
Registered User
Join Date: Dec 2013
Location: Ohio
Posts: 2
My Ride: 2004 M3 Coupe
McGrady is offline   Reply With Quote
Old 05-22-2015, 12:40 AM   #3
Registered User
Join Date: Aug 2008
Location: Torrance, CA
Posts: 2,159
My Ride: '99 323i & '02 540i
That's not a problem I've heard of before. Fuse 49 powers the CPU in the general module which is responsible for door locks, windows, wipers and a few other functions. When you say the driver side window slowly goes down over time what do you mean exactly? Literally the windows slowly creeps down over a period of time or you leave and when you come back the window is down or partially down? It's definitely not a window regulator and not the windows switches. The window switches are disabled after you take the key out of the ignition and open one of the doors. I don't see how this could happen. The general module may be bad and need to be replaced.
scottjoh is offline   Reply With Quote
Old 05-22-2015, 07:51 AM   #4
Registered User
Join Date: Jul 2008
Location: USA
Posts: 2,063
My Ride: 2001 330Ci
Check out www.bmwgm5.com for info.
markusmarkus is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON

All times are GMT -5. The time now is 01:41 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use