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Thread: Dead battery questions

  1. #1
    Join Date
    Mar 2016
    Location
    Lincoln, NE
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    272
    My Cars
    91 735iL

    Dead battery questions

    Hey everyone,

    So my battery is very low and I can't get into the car. Tried emergency unlocking it through the passenger door. The mechanism doesn't come up far enough to open the door. Pumped the handle but still not enough. Got in the trunk to go use the light method but still nothing. I've came up with a few questions.

    Wifh using the light method, I know the red/white wire is positive but should I disconnect the other wire from the light? I've heard yes and no on using a battery to connect it everything. Is it okay? Im using the battery from my daily. If so how long?

    Then I do have power 4 gauge power wire for my amps that is connect to my battery. Could I realistically use that wire to get power to the battery? I don't see why I couldn't but wanted to know other opinions.




    Nevermind I got it! Powered and jump started it through the power wire from my amp!
    Last edited by NE32; 10-19-2017 at 02:30 PM.

  2. #2
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    Good to hear that you fixed it, I wanted to post this: Try unlock procedure on both doors, driver and passenger, your model year could maybe also work on driver side, my 1989 I can open via both doors.
    http://www.bmwe34.net/E34main/Trouble/Locked.htm
    unlocking deadlocked car via trunk light connection by Timm:
    The emergency unlock is known by lifting the passenger door handle and then turning the key over a certain resistance. Even with a dead battery the trunk can be opened with the key by turning it anti-clockwise and then push the door unlock button.
    To avoid wrong connection of power to the wires or to blow the fuse:
    A few pointers to connecting power to the trunk light:
    Firstly, the trunk light is a good place to connect power as it is constantly connected to the battery via Fuse 33.
    However, you must only use a charger at this point, and only one that can supply a maximum of 10A. If you use a fully-charged battery you will blow Fuse 33.
    The trunk light has two wires going to it, RED/WHITE is the positive supply, connect the chargers +ve terminal to here.
    Connect the charger -ve lead to somewhere on the chassis.....this removes any possibility of reverse polarity.
    When the charger is connected and charging, allow 10 minutes before trying the central locking, this is just enough time to get enough charge in the battery to supply the locks.
    If you have not got a charger you can use a battery but MUST connect it via a 55W (headlamp) bulb. This reduces the current to a safe level.

    DO NOT connect to any other lighting point, these go via the LKM or General Module and it is not a good idea to stuff power up these!

    The trunk can always be opened with the key, it does not need power, so you always have access to the trunk.
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    May 2012
    Location
    Boynton Beach, Florida
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    1,526
    My Cars
    1990 735I (E32) M30
    Did you try this one exactly.................https://www.youtube.com/watch?v=1XQt4GowLGI
    1990 735I (Auto) E32 Feb 1990 to Present
    1996 Z3 Roadster (5 Speed) E36/7 Jan 1999 to Dec 1999
    1983 733I (5 Speed) E23 April 1983 to Feb 1990
    https://www.youtube.com/watch?v=2d4tHoHGaJo
    https://1drv.ms/v/s!Av20xCMMocSsyEpl...h_oOk?e=ekIcAT







  4. #4
    Join Date
    Jan 2005
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    Japan
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    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    If that unlocking procedure does not work, replace the grommets https://www.bimmerforums.com/forum/s...light=grommets
    Shogun tricks and tips for the E32 series are HERE!

  5. #5
    Join Date
    Mar 2016
    Location
    Lincoln, NE
    Posts
    272
    My Cars
    91 735iL
    Yeah, that was the first video I looked at. It works but the locks don't come up enough to open the doors. I just had to be a little creative!
    Quote Originally Posted by CroughtonE32 View Post
    Did you try this one exactly.................https://www.youtube.com/watch?v=1XQt4GowLGI

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