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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 10-10-2015, 05:09 PM
IPT8 IPT8 is offline
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X3 warnings lights and more

Alright I'm not really a BMW guy. I work in auto body and have less mechanical experience. I been trying to figure this problem out for a while. Taking it to a BMW shop is the last resort. This is my moms car that I'm trying to fix. I googled and searched the forums and am not finding the answers.
She has a 2005 X3 auto 3.0L. The brake warning light is on in yellow. 4X4 light is on. ABS light is not on. Her brake lights in the rear are always on. Doesn't matter if you press the brake petal or not. I put in a new brake switch didn't do anything. I saw the thread about the transfer case actuator but it doesn't make any noise. I think this might be some other problem I can't figure out. I checked the fuses and they were good. And at low speeds under 5mph I think it feels like the brakes or something is jerking when braking suddenly. Also the warning for a bulb is out is on but I can't find any bulbs that are out.
If you guys have and ideas maybe someone went through this please let me know because I'm clueless. Thanks in advance
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  #2  
Old 10-10-2015, 05:48 PM
Supercourse Supercourse is online now
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Mein Auto: 2004 X3 2.5i
If brake lights are always on (while driving?) that could have stressed the battery and voltage fluctuations triggered the 4x4 light. Not heard of these actual symptoms before though.

What happens in the rear light cluster when you switch the main lights on? Outer bulbs go on and inner brake light bulbs stay on? Is the high-mounted brake light on as well?

I would suspect a bad ground somewhere back there.

Maybe start taking bulbs out one by one and checking what happens.

The jerking at low speeds could be that the low battery has caused limp mode to be activated.
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  #3  
Old 10-10-2015, 06:39 PM
IPT8 IPT8 is offline
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Outer bulbs go on when turning the lights on and inner brake bulbs lights stay on. High mount light stays on too. Inner brake light bulbs and high mount light stays on while driving. Took out the bulbs one by one nothing happened. Battery is at 12 volts while car is off.
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  #4  
Old 10-10-2015, 06:59 PM
Supercourse Supercourse is online now
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12.00v? That's about 75% discharged.
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  #5  
Old 10-10-2015, 07:33 PM
IPT8 IPT8 is offline
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So you think getting a new battery might might fix all those problems?
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  #6  
Old 10-10-2015, 10:27 PM
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X3-terrestrial X3-terrestrial is offline
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I would read the codes with INPA or a similar tool that read BMW codes to see what comes up. Doesn't matter the CEl is off, these cars throw codes for a bunch of different stuff.


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  #7  
Old 10-12-2015, 08:37 PM
IPT8 IPT8 is offline
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Alright here are some of the codes its showing.
There were others but that's for airbag stuff

5f42-Transmission control, limp-home operation
5EB1 steering-angle sensor, supply
5F3A Transfer case: malfunction
5E5F Wheel-speed sensor, general
5F23-Engine management: interface
5E63-Brake light switch permanently actuated
02-belt tensioner, driver
0B-safety battery terminal 1
50-power supply
88-side sensor, B-pillar, X-direction, left
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  #8  
Old 10-12-2015, 09:14 PM
mikesmith2 mikesmith2 is offline
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Clear the codes, fully charge the battery then see what codes you get.

If they stay off then a new battery is in order, if not then it's an electrical fault somewhere
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  #9  
Old 10-26-2015, 03:18 PM
IPT8 IPT8 is offline
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I cleared the codes and charged the battery. Bike lights never went away and on the dash the brake and 4x4 light come back on.

These are the two codes after rescan.


5F23 Engine management: interface
5E63 Brake light switch permanently actuated
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  #10  
Old 10-27-2015, 02:59 PM
IPT8 IPT8 is offline
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Thanks guys for trying to help. Looks like we found the problem. It's kind of funny but my uncle found a brake light fuse missing which was weird. We put in a fuse and what do you know it fixed all those problems.
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  #11  
Old 10-28-2015, 01:12 AM
mikesmith2 mikesmith2 is offline
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Glad it was a cheap and easy fix.

The only question is, why was the fuse missing in the first place?
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