Trunk won’t open because of disconnected battery

Mrm4sw49r · 08-10-2019, 06:32 AM

Hi can someone please help me out
I disconnected my positive wire from my battery not knowing that if I close the trunk that I can’t open the trunk again
I’ve try everything that I’ve found on the net but it doesn’t work like jump starting from the front terminal in the boot
I can get access to the trunk from the back seat because I can’t seem to open the two main backseats
Also when I disconnected the battery the fan come and it’s been running for 6-7 hours now
Can someone please help me out
I dnt know what I have to do now
Thanks in advance

DAB-055 · 08-10-2019, 07:58 AM

https://f80.bimmerpost.com/forums/sh....php?t=1410407

Hope that helps.

Mrm4sw49r · 08-10-2019, 08:56 AM

Hi da-055 I’ve seen this post already
I think his car is a m3
I have the m4 coupe and I try doing the same thing he did but the problem is I dnt have that emergency trunk latch
And my seating position is a little different to his
I think the only way is to wiring the car so that it bypass the battery so that the car will have power to start
What type of people knows how to do this ? Electrician ,mechanics etc does anyone knows?
I really dnt wanna call bmw because they gonna charge me a arm and a leg

FriedPiston · 08-10-2019, 01:06 PM

https://f80.bimmerpost.com/forums/sh....php?t=1604304

mynameisplayer · 08-10-2019, 09:40 PM

Trick is to tie a cloth through the boot latch hook when flashing so it can't shut.

Mrm4sw49r · 08-10-2019, 10:05 PM

thanks guys for the help but I've try all of that already
can someone please tell me what type of person/trades can wire a car so so there's power to opener the trunk?
electrician ?

Mrm4sw49r · 08-10-2019, 10:11 PM

the funny thing is when I try to jump start the car from the engine bay
the fan came on
I dot know why it came on

Isdonisgood · 08-13-2019, 05:56 AM

This happened to me when I was installing the steering wheel.
Solution is to get a jump start cable connect it in the engine bay and you will have the power to open the boot from inside the cabin. Hope it helps.

hz_diesel · 08-13-2019, 06:10 AM

Quote:

Originally Posted by donovanluong

This happened to me when I was installing the steering wheel.
Solution is to get a jump start cable connect it in the engine bay and you will have the power to open the boot from inside the cabin. Hope it helps.

+1 this worked for me too

Mrm4sw49r · 08-13-2019, 07:28 AM

Quote:

Originally Posted by donovanluong

This happened to me when I was installing the steering wheel.
Solution is to get a jump start cable connect it in the engine bay and you will have the power to open the boot from inside the cabin. Hope it helps.

I’ve try that already
First with a power booster pack and then using another car but no good aswel

Mrm4sw49r · 08-13-2019, 07:31 AM

Is m4 battery lithium battery?

hz_diesel · 08-13-2019, 08:39 AM

Quote:

Originally Posted by Mrm4sw49r

Is m4 battery lithium battery?

sadly I am not sure, whatever it is for the stock 2015 battery

domino_z · 08-13-2019, 10:36 PM

this glaring design fault occurred to me when i was half way through installing my electric trunk kit - if the supplied electric latch fails, how do i get into the trunk as M3 seat releases are in the trunk

i ended up buying all the parts to retrofit the US style safety release - the glow in the dark release lever that US regs have in case someone gets locked in the trunk

this way i can pull the side rear seat bolster off, and fish for the remote release through the gap

Mrm4sw49r · 08-14-2019, 04:52 AM

That’s a very good idea
May I ask where u buy that kit from ?

domino_z · 08-14-2019, 05:26 AM

Quote:

Originally Posted by Mrm4sw49r

That's a very good idea
May I ask where u buy that kit from ?

Not a kit, I got all the part numbers from this thread and put it together during my trunk install

https://www.bimmerpost.com/forums/sh...php?p=21403313

hz_diesel · 08-14-2019, 10:28 AM

i have the release and im telling you it was a b*tch to try and get it, i spent 3 hours and didnt snag it. I was lucky and bridging the car method worked for me.

A'PEXi · 08-26-2019, 07:06 AM

Quote:

Originally Posted by domino_z

Not a kit, I got all the part numbers from this thread and put it together during my trunk install

https://www.bimmerpost.com/forums/sh...php?p=21403313

was this hard to install?

F82 Jayk · 09-23-2023, 04:57 AM

Did you find a solution?

08-10-2019, 06:32 AM	#1
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	Trunk won’t open because of disconnected battery Hi can someone please help me out I disconnected my positive wire from my battery not knowing that if I close the trunk that I can’t open the trunk again I’ve try everything that I’ve found on the net but it doesn’t work like jump starting from the front terminal in the boot I can get access to the trunk from the back seat because I can’t seem to open the two main backseats Also when I disconnected the battery the fan come and it’s been running for 6-7 hours now Can someone please help me out I dnt know what I have to do now Thanks in advance
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08-10-2019, 07:58 AM	#2
DAB-055 Private 10 Rep 90 Posts Drives: BMW F80 M3 Comp. Pack Join Date: Dec 2015 Location: Melbourne iTrader: (0)	https://f80.bimmerpost.com/forums/sh....php?t=1410407 Hope that helps.
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08-10-2019, 08:56 AM	#3
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	Hi da-055 I’ve seen this post already I think his car is a m3 I have the m4 coupe and I try doing the same thing he did but the problem is I dnt have that emergency trunk latch And my seating position is a little different to his I think the only way is to wiring the car so that it bypass the battery so that the car will have power to start What type of people knows how to do this ? Electrician ,mechanics etc does anyone knows? I really dnt wanna call bmw because they gonna charge me a arm and a leg
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08-10-2019, 01:06 PM	#4
FriedPiston Colonel 1973 Rep 2,711 Posts Drives: Scraper Join Date: Oct 2013 Location: East Oakland, CA iTrader: (26)	https://f80.bimmerpost.com/forums/sh....php?t=1604304
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08-10-2019, 09:40 PM	#5
mynameisplayer SCHNELL 224 Rep 835 Posts Drives: F15 50i, E46, E90, Crafter van Join Date: May 2016 Location: Australia iTrader: (0)	Trick is to tie a cloth through the boot latch hook when flashing so it can't shut.
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08-10-2019, 10:05 PM	#6
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	thanks guys for the help but I've try all of that already can someone please tell me what type of person/trades can wire a car so so there's power to opener the trunk? electrician ?
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08-10-2019, 10:11 PM	#7
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	the funny thing is when I try to jump start the car from the engine bay the fan came on I dot know why it came on
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08-13-2019, 05:56 AM	#8
Isdonisgood Enlisted Member 6 Rep 48 Posts Drives: BMW M3 Comp LCI2 Join Date: Feb 2017 Location: NSW iTrader: (0)	This happened to me when I was installing the steering wheel. Solution is to get a jump start cable connect it in the engine bay and you will have the power to open the boot from inside the cabin. Hope it helps.
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08-13-2019, 07:31 AM	#11
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	Is m4 battery lithium battery?
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08-13-2019, 10:36 PM	#13
domino_z Lieutenant Colonel 1240 Rep 1,972 Posts Drives: F-Pace SVR Join Date: Apr 2008 Location: Australia iTrader: (0)	this glaring design fault occurred to me when i was half way through installing my electric trunk kit - if the supplied electric latch fails, how do i get into the trunk as M3 seat releases are in the trunk i ended up buying all the parts to retrofit the US style safety release - the glow in the dark release lever that US regs have in case someone gets locked in the trunk this way i can pull the side rear seat bolster off, and fish for the remote release through the gap Attached Images Last edited by domino_z; 08-13-2019 at 10:42 PM..
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08-14-2019, 04:52 AM	#14
Mrm4sw49r Private 2 Rep 73 Posts Drives: bmw m4 Join Date: May 2019 Location: Sydney iTrader: (0)	That’s a very good idea May I ask where u buy that kit from ?
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08-14-2019, 10:28 AM	#16
hz_diesel Lieutenant Colonel 192 Rep 1,703 Posts Drives: 2012 E92 335ix Join Date: Jun 2015 Location: New England iTrader: (7)	i have the release and im telling you it was a b*tch to try and get it, i spent 3 hours and didnt snag it. I was lucky and bridging the car method worked for me.
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09-23-2023, 04:57 AM	#18
F82 Jayk Registered 0 Rep 2 Posts Drives: Bmw m4 Join Date: May 2023 Location: Vancouver iTrader: (0) Garage List 2015 bmw f82 [0.00]	Did you find a solution?
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