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Old 03-02-2018, 12:02 AM
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My X5 Acting Crazy

Hello all members im having a little issue with my X5 whenever i turn of the lights on my light switch my truck lid opens . has anyone else have this issue?
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Old 03-02-2018, 12:30 AM
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What?



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Old 03-02-2018, 12:37 AM
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when i turn off the lights the trunk opens. very strange
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Old 03-02-2018, 04:51 AM
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You've got a short somewhere but I haven't run into that so no idea beyond that sorry.
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Old 03-02-2018, 01:39 PM
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Quote:
Originally Posted by cuban_bmwx5 View Post
when i turn off the lights the trunk opens. very strange
Check the trunk lid opener button in your dash(one of those four in the middle behind the gear stick).Might be stuck.
If not try spraying contact cleaner in the light switch and in the trunk lid opener button.
I use isopropilic alcohol spray.
You can get it in any electronics parts shop,or some hardware stores must sell it.
If none of these will fix the problem,then you have a short in the wiring harness somewhere,which will not be easy to spot...
Hope this helps
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Old 03-02-2018, 02:10 PM
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When the e38 sedans & e39/e46 sedans & Tourings have weird issues with the tailgate and other seemingly unrelated components...it pays to look closely at the wiring looms that have bundled wires going from the tailgate into the body. As the tailgate or trunk lid opens/closes...it can eventually break/chafe the wires causing shorts.

If nothing else...it would be a place to investigate since it is a place where the lights (rear tail lights) and the tailgate electronics come in contact with each other. Those electrical loom (up near the hinges) carry wiring for all rear lights and tailgate functions through those corrugated looms you can see when you open the tailgate

Examples of what has been found after examining the loom of various BMW trunks & tailgates:






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Last edited by Qsilver7; 03-02-2018 at 04:56 PM.
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Old 03-02-2018, 02:14 PM
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^Yep, used to see those come into the shop like that and require patching. Definitely worth taking a look at as it doesn't take but a few minutes.
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Old 03-02-2018, 03:02 PM
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Quote:
Originally Posted by Qsilver7 View Post
When the e38 sedans & e39/e46 sedans & Tourings have weird issues with the tailgate and other seemingly unrelated components...it pays to look closely at the wiring loom that has bundle wires going from the tailgate into the body. As the tailgate or trunk lid opens/closes...it can eventually break/chafe the wires causing shorts.

If nothing else...it would be a place to investigate since it is a place where the lights (rear tail lights) and the tailgate electronics come in contact with each other. Those electrical loom (up near the hinges) carry wiring for all rear lights and tailgate functions through those corrugated looms you can see when you open the tailgate

Examples of what has been found after examining the loom of various BMW trunks & tailgates:






I had the same broken wires in the lid/body loom(5 wires i patched)My tail lights and lid opener started playing up...
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Old 03-02-2018, 10:25 PM
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now where are these wires so i can check them i just went ouside to look and i didnt see them. and also i was out the playing wit the x5 when i lock the door and turn off headlight switch the truck don't pop open it only happens when the doors are unlocked and to headlight switch off
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Old 03-03-2018, 12:06 AM
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Quote:
Originally Posted by cuban_bmwx5 View Post
now where are these wires so i can check them i just went ouside to look and i didnt see them. and also i was out the playing wit the x5 when i lock the door and turn off headlight switch the truck don't pop open it only happens when the doors are unlocked and to headlight switch off
Location of the looms were mentioned...and would naturally be located where the tailgate and body of he car remain the closest as the tailgate is opened/closed (look up near the hinges where the tailgate is attached to the body of the car).

Also see #3 in the "added" diagram below which also indicates the location of the major wiring harness that goes from the body of the vehicle to the tailgate:

Quote:
Originally Posted by Qsilver7 View Post
If nothing else...it would be a place to investigate since it is a place where the lights (rear tail lights) and the tailgate electronics come in contact with each other. Those electrical looms (up near the hinges) carry wiring for all rear lights and tailgate functions through those corrugated looms you can see when you open the tailgate

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  • 2006 e53 X5 4.4i (12/05 build date) Sterling Gray exterior/Schwarz (black) Dakota Leather interior
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  • 1999 e39 540iT (sold) Orient Blue
  • 1995 e34 525iT (sold) Alpine White
  • 1991 e32 735iL (sold) Schwarz (black)
  • 1985 e30 325e (sold) Bronzit
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