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-   -   Unable to open doors due to disconnected battery (http://www.bimmerfest.com/forums/showthread.php?t=649697)

Bugsie 10-03-2012 02:10 PM

Unable to open doors due to disconnected battery
 
Hi all.

I just finished read the thread, while sitting near my car, and was unable to open the doors.

The car was parked for 2 weeks so I disconnected the battery, just in case.

Today I arrived and couldn't open the doors. Connected myself to the forum and tried all the tips on a thread posted a while ago.

Then I remembered that I left the negative cable way down and try to reach it from under. I was able to link a cable between that cable and a (-) from a donor car. NOTHING.

What now???

Tips, advices. Appreciate all the help.

Best regards

Bugsie 10-03-2012 04:19 PM

Hi all. One more thing.
I connected ground to another car and positive remains on mine.
I only disconnected groumd and my battery was ok.
I'm I missing something obvious???
Thanks and best regardd

My525iT 10-03-2012 08:40 PM

I do not understand.
Are you able to gain entry to the vehicle but the doors remain locked?
Way down?

Typically, if the battery is completed disconnected (negative and positive), you have to manually lock each door.
I do this all of the time with my 92 M50.

robertobaggio20 10-03-2012 09:00 PM

Quote:

Originally Posted by Bugsie (Post 7111915)
Hi all. One more thing.
I connected ground to another car and positive remains on mine.
I only disconnected groumd and my battery was ok.
I'm I missing something obvious???
Thanks and best regardd

Yes, you do not have a closed circuit. It has to be a circle. The positive in your car can now get OUT of your car to the next car THROUGH the negative, but cannot return to the positive on your car.

Charge does not travel both ways on one wire. Connect the positives.

Before that, just try the emergency door unlock procedure, but with the following difference. Try lifting the door handle WHILE you are turning the key and not before. See if that works. You may have to do that several times to get the right simultaneous combination working.

Bugsie 10-04-2012 01:38 AM

Hi all.

My car has the battery on the motor compartment and I simply disconnect the ground. I can reached it from under the car because the cable is hanging.

I tried that emergency procedure after reading a thread here but not working. I'll keep trying.

Again , I'll also try to find a hot connection from the battery, maybe the starter, and connect positive there and ground on the hanging cable.
Thanks Roberto. I also thought of that. Something was missing there and I couldn't get it right after a 8 hours flight.

I'll keep trying, thanks for the help.

Best regards

Bugsie 10-04-2012 01:26 PM

Hi all.

Done. After reading some threads, I just plugged a booster to the starter and ground it on the vehicle. Popped right away.

Thanks to all.

Best regards

MeanM50 10-04-2012 03:56 PM

Quote:

Originally Posted by Bugsie (Post 7113869)
Hi all.

Done. After reading some threads, I just plugged a booster to the starter and ground it on the vehicle. Popped right away.

Thanks to all.

Best regards

You can do the same by plugging a 'booster' into the rear side markers...way easier.

paperplane94 10-04-2012 04:02 PM

Quote:

Originally Posted by MeanM50 (Post 7114144)
You can do the same by plugging a 'booster' into the rear side markers...way easier.

or the trunk light...

MeanM50 10-04-2012 04:04 PM

Quote:

Originally Posted by paperplane94 (Post 7114162)
or the trunk light...

Some people can't get to the trunk light...the marker light is ALWAYS available.

paperplane94 10-04-2012 07:34 PM

Quote:

Originally Posted by MeanM50 (Post 7114165)
Some people can't get to the trunk light...the marker light is ALWAYS available.

My sidemarkers are sooooo brittle its not even funny. The trunk doesn't need any electronics to open with the key.

Bugsie 10-05-2012 04:38 AM

Hi all.

The trunk didn't open with the key.

Sorry to ask, but what do you mean by marker??

For the two procedures, trunk and marker, the ground cable can be disconnected???

Thanks for those tips. I have to keep those in mind for the next time.

Best regards

MeanM50 10-05-2012 09:08 AM

Quote:

Originally Posted by Bugsie (Post 7114992)
Hi all.

The trunk didn't open with the key.

Sorry to ask, but what do you mean by marker??

For the two procedures, trunk and marker, the ground cable can be disconnected???

Thanks for those tips. I have to keep those in mind for the next time.

Best regards

Sorry Bugs...euro cars don't have 'side markers'...they are little rectangular lights that the US cars have on their bumper trim...it's the white rectangle on the rear bumper in this pic:

http://carphotos.cardomain.com/ride_...0172_large.jpg

YOUR bumper should have 'euro trim'...AKA-flat trim...no light...like this pic:

http://www.bmwsociety.com/gallery/e34/4/01.jpg

Now, I would wager that the harness for the rear side marker is present on your car...pop the trim off the bumper and look around for an unhooked light harness. The trick should work with no batt hooked up...all it does is feed the voltage through the system backwards so you can use the locks...it's the same thing as hooking a lead to the starter...but it's WAY easier to get to...

Good luck!

paperplane94 10-05-2012 10:37 AM

Trunk doesn't open manually with the key?
That's a first...
Something is wrong with it then.

BMR_LVR 10-05-2012 11:23 AM

Quote:

Originally Posted by paperplane94 (Post 7115741)
Trunk doesn't open manually with the key?
That's a first...
Something is wrong with it then.

Hmmm..... I was thinking that the actuator for the trunk is electrically powered ??? Is this not correct?

Bugsie 10-05-2012 02:26 PM

Hi all. Thank you so much for all the inputs.

And I believe so. The trunk lock is electrically powered.

Also, my car comes with LSD, lowered suspension and a few more features. As far as I researched, there was some special editions here in Portugal with those..

I'll look for that harness

Best regards

MeanM50 10-06-2012 08:22 AM

Quote:

Originally Posted by BMR_LVR (Post 7115859)
Hmmm..... I was thinking that the actuator for the trunk is electrically powered ??? Is this not correct?

It IS electrically powered...but the mechanics are directly driven by the key...so it SHOULD work with the key EVERY time...but I have ran into a trunk that didn't open with they key...you will likely need a new trunk latch to fix the problem.

Quote:

Originally Posted by Bugsie (Post 7116225)
Also, my car comes with LSD, lowered suspension and a few more features. As far as I researched, there was some special editions here in Portugal with those..

I'll look for that harness

Best regards

In the US, we didn't have the 525i 'sport'...because it featured all the options that came standard in the US (other than the LSD). We all got moonroofs, power windows and power leather seats standard...while EU markets had to 'option' leather seats and power windows etc...

My525iT 10-06-2012 10:15 AM

Just noticed that Bentley has an emergency unlock procedure on pg. 515-2.
Has anyone tried this?

Due to a discharged battery, use the passenger side front door (additionally drivers side on pre 1990). Place key in lock and lift door handle while turning key fully in CW direction. Same to lock.

MeanM50 10-06-2012 07:53 PM

Quote:

Originally Posted by My525iT (Post 7117476)
Just noticed that Bentley has an emergency unlock procedure on pg. 515-2.
Has anyone tried this?

Due to a discharged battery, use the passenger side front door (additionally drivers side on pre 1990). Place key in lock and lift door handle while turning key fully in CW direction. Same to lock.

It's not 100%...the mechanism that operates the 'emergency unlock procedure' can break very easily. I've had terrible luck in this department. Almost every E34 I've owned hasn't worked.

BMWFatherFigure 10-06-2012 07:58 PM

+1 with the trunk (boot) lock. It should have a rod attached to the lock at all times - mechanicial unlock. Check the owners hand book as to which way to turn the key. If the car did not come with one try e-bay. Worked for me.

Bugsie 10-07-2012 02:00 PM

Hi all.

Tried that "emergency opening" with no luck.

The key doesn't move on the lock neither way. I'll put that on the correction list. Stay tuned for a new thread after the compression test.

Here we have to "build" he car. For instance, mine as ZF box, LSD, lowered suspension, electric all around, two temperatures AC, pre-heating device, fabric seats...


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