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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E60 (2004 - 2010)

E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 11-03-2013, 08:29 AM
Boland01 Boland01 is offline
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Location: Magnolia, TX
 
Join Date: Aug 2013
Posts: 57
Mein Auto: 2010 535iX, 1996 328i
Unhappy 2010 535 High Brake Lamp Won't Turn Off

I recently purchased a 2010 535ix from a private party. My wife noticed the third (high brake lamp) would not come on when I applied the brakes. I took the cover off the third brake light and noticed the plug in was disconnected. When I plugged it back together the third brake light came and remained on even when the brakes were not applied.

Not wanting to run my battery down I unplugged the connection again. Does anyone have any idea how I can track problem this down? It seems the third brake light is not wired to the rear brake llights.

Does anyone have a wiring schematic so I can trace it back?

Could the third brake light itself be bad (I'm thinking that's probably not the culprit since it lt up when I reconnected the plug in cables).

Would the brake switch be a likely source or does it sound like a module or grounding issue.

Any directional help is appreciated. So far my interent search hasn't turned up anything.
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  #2  
Old 11-03-2013, 10:35 PM
wcr3d wcr3d is offline
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Location: Indiana
 
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Mein Auto: 2006 530XI
I would start with a new bulb first. But since it was a known issue to the previuos owner it is probably ok. Still it is best to start with the basics when troubleshooting. Then I would check the continuity, which should tell you any short/grounding issues. Sorry I don't know about any schematics besides a bentley manual.
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  #3  
Old 11-04-2013, 06:51 AM
Boland01 Boland01 is offline
Boland01
Location: Magnolia, TX
 
Join Date: Aug 2013
Posts: 57
Mein Auto: 2010 535iX, 1996 328i
Thanks for the info. I ordered a used high brake light just to eliminate or confirm that possibility. If that's not it the "easiest" route may be to tap into the taillight brake light and run a line to the high brake lamp from there. There is a chasis ground right next to the brake lamp so that should be no problem. Since this are LED lights and looking at the thin wire gauge I'm thinkiong the addional amp draw should be minimal so hopefully it won't throw a code. The alternate would be to run a line to the brake switch.
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  #4  
Old 11-04-2013, 12:30 PM
banglenot banglenot is offline
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Location: Ft. Lauderdale and Connecticut
 
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Posts: 1,263
Mein Auto: 2007 530
Boland,

Attached is an online version of the BMW wiring diagram. Bit clunky, but as far as I can tell it has every circuit in an E60.

Good luck.

http://www.bmw-planet.com/diagrams/r...0e61/index.htm

Bangle
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  #5  
Old 11-04-2013, 02:10 PM
Boland01 Boland01 is offline
Boland01
Location: Magnolia, TX
 
Join Date: Aug 2013
Posts: 57
Mein Auto: 2010 535iX, 1996 328i
Thanks for the information. You are right it is clunky to use. Unfortuately, couldn't find the third brake lamp wiring diagram.
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  #6  
Old 11-05-2013, 08:23 AM
Boland01 Boland01 is offline
Boland01
Location: Magnolia, TX
 
Join Date: Aug 2013
Posts: 57
Mein Auto: 2010 535iX, 1996 328i
I'm going to try disconnecting the brake light switch on the pedal to see if that turns off third brake light. That will at least minimize the brake switch being the potential culprit.
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  #7  
Old 11-07-2013, 12:47 PM
Boland01 Boland01 is offline
Boland01
Location: Magnolia, TX
 
Join Date: Aug 2013
Posts: 57
Mein Auto: 2010 535iX, 1996 328i
Fixed it. Ending up running a line from the taillight brake light #7 plug in to the third brake light and bypassed the original third brake light connection. . Everything works fine now with no codes. Wished I could have figured why the third brake light always had power but at least I'm legal again.
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