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Bo525i
03-10-2009, 03:45 AM
During a 350 miles long ride yesterday at nite something wierd happened several times to my instrument cluster, radio, aircon and OBC lights..

When using any switch like turning the foglights on, using the blinkers or flashing the headlights even touching the brake etc. the entire dash, all lights in front of me would turn off for a sec or two!

Very disturbing @ 75 mph :(

Any pointers?
Mordan
03-10-2009, 05:45 AM
During a 350 miles long ride yesterday at nite something wierd happened several times to my instrument cluster, radio, aircon and OBC lights..

When using any switch like turning the foglights on, using the blinkers or flashing the headlights even touching the brake etc. the entire dash, all lights in front of me would turn off for a sec or two!

Very disturbing @ 75 mph :(

Any pointers?

never had that. but my hoink stopped working because there was water under the rear seat.

also my temp gauge is acting funny because of a bad contact between the dash and instrument panel
bsell
03-10-2009, 06:58 AM
During a 350 miles long ride yesterday at nite something wierd happened several times to my instrument cluster, radio, aircon and OBC lights..

When using any switch like turning the foglights on, using the blinkers or flashing the headlights even touching the brake etc. the entire dash, all lights in front of me would turn off for a sec or two!

Very disturbing @ 75 mph :(

Any pointers?

Sounds like something getting hot and the connection failing. Bad grounding point somewhere?

Brian
paanta
03-10-2009, 07:52 AM
+1 to bad grounds, or possibly some wiring shorting out somewhere. I'd start with the headlight switch, though. Are you running higher wattage headlights? That can definitely cause some overheating in that area...
Bo525i
03-10-2009, 08:56 AM
No, Iīm running xenons.. but it does it too when I use foggies (stock bulbs) only! Where would I find the grounding points?
bsell
03-10-2009, 01:49 PM
No, Iīm running xenons.. but it does it too when I use foggies (stock bulbs) only! Where would I find the grounding points?

Search around here, there have been several postings with pictures I belive...

Start with the point that has the most of the symptomatic systems on it.

Brian
BMWDriver
03-10-2009, 05:26 PM
Fusible links perhaps ?
Bo525i
03-10-2009, 05:33 PM
If it was the fusible link wouldnīt the headlights, fogs etc turn off too? coz they donīt ever..
BMWDriver
03-10-2009, 09:21 PM
Well, I'm no expert on the electrical system of the E34. I especially remember it coming up for different and similar issues. Could be worth looking at methinks. But re-reading your description, perhaps not.

It's as if when extra current is required for the actions described, it breaks balance in the electrical system for a moment and stresses something that makes the power outage in the interior lighting system.

Maybe a relay is dying. But plus one on what's also being recommended above.
Bo525i
03-11-2009, 03:51 AM
It's as if when extra current is required for the actions described, it breaks balance in the electrical system for a moment and stresses something that makes the power outage in the interior lighting system.

Thats what it seems like to me too.. Thx for all your pointers, please bring on some more if you have any! :)