Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-13-2022, 10:23 AM
Member
 
Join Date: May 2021
Location: France
Posts: 117
grounch is on a distinguished road
Power drain from fuse 27 (or not)

Hi


Having a power drain issue i tried to find out what's the drainer, because no surprise it's quite a problem to have a dead battery after couple of days.

Unplugged the usual stuff: heater hedgehog, nav/radio units (fuses 74 75 in trunk), nothing.

Then found another topic here talking about few fuses to try (27 42 48).
And bingo, after removing 27 the voltage stopped dropping even after few hours. Did not have to go thru the annoyance of the ampmeter diagnosis.

The problem now is to find out what it really powers, because "20A Multifunction control module 1" is not really explicit..
All i can notice it turns off all interior lights, even tho it's not fuse 42 supposed to be the one for "interior lamps".

Does someone have a detailled electric diagram of what is connected to what fuse?


Or anyone already been throught that and know where it goes?


Thanks

Last edited by grounch; 04-20-2022 at 08:33 AM.
Reply With Quote

Sponsored Links

  #2  
Old 04-13-2022, 01:05 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 1,376
Clavurion is on a distinguished road
F27 is one of the continuous (Terminal 30) supplies to General module (GM3).

Does the vehicle go to sleep mode after 16 mins?
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
  #3  
Old 04-13-2022, 01:49 PM
Member
 
Join Date: May 2021
Location: France
Posts: 117
grounch is on a distinguished road
I guess it does, shifter P light goes off at least. Any way to be sure it goes to sleep correctly?
Looks like this fuse is also for the xenon headlights.

Found about the gm3 that it also controls remote key lock and windows. They both still work when i disconnect fuse 27

Last edited by grounch; 04-13-2022 at 04:13 PM.
Reply With Quote
  #4  
Old 04-13-2022, 09:27 PM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,422
X5chemist is on a distinguished road
The general module controls a lot of stuff. It has several small relays and switches on it. It’s known to go bad. Mine has a drain from F60. Once I get it back, I’ll troubleshoot it more.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #5  
Old 04-15-2022, 06:04 PM
Member
 
Join Date: May 2021
Location: France
Posts: 117
grounch is on a distinguished road
Well, not sure how to explain that, but after removing the fuse and putting it back (maybe 2 times after all the testing) it seems my power drain issue solved... by itself
Reply With Quote
  #6  
Old 04-16-2022, 09:13 AM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,422
X5chemist is on a distinguished road
Stuck relay on GMIII probably opened cutting off power. Keep an eye on it.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #7  
Old 04-17-2022, 01:29 PM
Member
 
Join Date: May 2021
Location: France
Posts: 117
grounch is on a distinguished road
Yeah not so much of a miracle after all, still have some drain after using the car again.
Is there a way to diagnose more precisely what is causing it? Test the relays you mentioned?
Or just replace the gm3 and hope the new one will be ok (need to recode something or it's plug and play?)
Reply With Quote
  #8  
Old 04-17-2022, 02:34 PM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,422
X5chemist is on a distinguished road
You are at the same point as mine. My problem is F60. 200 mA draw.
The GMIII is a known problem. You can see the inside of one here.
https://www.bmwgm5.com/GM3_Info.htm

Mine was sent for repairs and refurbished. It didn't fix the problem on F11 or F60. F11 drain was fixed with an EWS bypass. The GMIII does require coding. I need to acquire software to clone mine. Or find someone to clone if for me. If a clone fixes, the GMIII went bad after repairs. A shop quoted $1200 for a new module and coding. Even with a clone, they couldn't guarantee the sleep problem or drain from F60 would be fixed. If I pull F60, draw drops to 11 mA.

How many amps are going through the battery cable if F27 is pulled? With F27 inserted?
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #9  
Old 04-17-2022, 02:57 PM
Member
 
Join Date: May 2021
Location: France
Posts: 117
grounch is on a distinguished road
Haven't really measured the amps at the battery cables yet. Just left a voltmeter plugged in the cig lighter and checked every few hours.
Looks like a really annoying and costly problem to tackle..
Reply With Quote
  #10  
Old 04-17-2022, 03:11 PM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,422
X5chemist is on a distinguished road
F27 is a power source for GMIII. Assume something is else being supplied power or shorted out. Or the GMIII itself can be causing the problem. Determine how many amps are being drawn. How long does it take to drain the battery? I'm at a point, I can put a cut off switch for F60. Either an ignition power relay or toggle switch. When parking overnight, need to lock/unlock rear doors, or open the rear hatch and tailgate, F60 can be powered up. A seamless relay with key on power to power F60 seems ideal. No hassle other than wiring it in place.

Keep posting information. Maybe someone can help out.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 10:05 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.