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In Reply to: Possible OBC encounter??? posted by Smokey on March 28, 1999 at 00:37:52:
I had an '89 535i that did the same thing except my car went into "limp-home" mode (can't drive faster than 20 mph, fortunately I was 2 miles from home!) Went to the dealer, they replaced the headlight control module (under rear seat, left side, I think) cost me $400+. They never explained the stalling engine, freaking-out needles but checked the charging system - everything was OK. After that I never had the problem again. If you want to save yourself the $400, I can't remember where I saw it, but I believe the failure in the headlight control module is vibration causes some leads to loosen or break off on the circuit board. You can open the module and re-solder them, and then place some non-static foam (typically pink in electronic shipping packages) to support the circuit boards.
Maybe someone out there can help with the details?
Good Luck.
: A weird thing happened while I was stopped at a traffic light. I happened to take a look at my Instrument Panel and observed that the Tachometer and Speedometer needles started bouncing around at the same exact time. This happened for a quick second then the needles went went right back to point Zero. As I resumed driving the guages operated like this encounter never occured. About fifteen minutes later I observed that the right low beam was not operating. I then turned the light switch off for a quick second, and when I turned the switch back on the light came back on.
: What could be happening? Is the OBC defective? Can I perform a test on the OBC to make sure that this is the problem? Can I have the original board fixed or do I have to purchase a new or refurbished one? Where can I purchase one? Will I be able to install the OBC myself? Any information that can be provided will be appreciated!!!
: Thanks,
: Smokey
: '90 535ia (99k)
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