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Re: need bulbs for obc (archive)
[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Posted by Tom B. 86 735i on December 22, 2001 at 13:37:20:

In Reply to: need bulbs for obc posted by mc on December 21, 2001 at 21:50:22:

I actually replaced mine using high brightness red LEDs from Radio Shack. You need to use current limiting resistors in series with the LEDs. They draw a max of 30 milliamps so at 13.6 volts that would be about 453 ohms. Radio Shack should stock 470 ohm units. Try to get the 1/4 watt resistors for their smaller size. You have to cut one trace on the little circuit board and solder in one jumper. You also must pay attention to the polarity of the LED's. I used 1/2 watt resistors and almost couldn't fit them in. I wish I had written down and photographed what I did. If someone has a picture of the back side of the circuit board, I could show you how I did it. Note how the existing lamps are positioned as that is exactly how the LEDs were arranged when I was finished. Hopefully, I will never have to replace these again based on the better longevity of LEDs over filament type lamps. They might not be quite as bright as the lamps but I have no trouble seeing them in the daylight. Good luck.


Where can I find the bulbs to replace the two for the OBC? Also is it ok to replace a 7.5 fuse with a 10? Thanks in advance.




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