Re: OBC and other (related?) problems (archive)

It's the OBC on the instrument panel, the other one (next to the radio) works all the time. I'll try to replace the capacitor and see if that'll work (not that that'll be easy, since I've never been much of a DIY man). Thank you for all the help :)

Well, you did not mention all of this on your original post. The instrument problems may be due to the infamous capacitor problem. Several capacitors need to be replaced (check archives). Are you talking of the OBC display on the instrument panel or the OBC itself? All displays on the instrument cluster are back lit. If the lamps burn out, you will not be able to see the displays...working or not. DO the capacitor fix.

Strange though, when my OBC comes on (which happens sometimes) then immidiately the gear selected indicator comes on as well, plus consumption meter (under the spedometer), gas meter, thermometer and milage indicator (don't know if that's what it's called). Pretty sure that it isn't because of blown bulbs or fuses, although I'm no electrician or anything. I'm wondering if some unit regulates all these components, and if so, where is it and can it be fixed? Or has anyone had similar problems?

Any help greatly appreciated.

Regards,
Paul McBride, 735 '87

The OBC and the gear selected indicator are two different things which are in no way related. The gear selected indicator probably just needs a new bulb in the instrument cluster.

None working OBC can be as simple as needing to replace the three backlite lamps or a blown fuse. I forget where the fuse is located (not main fuse box). Maybe someone can help here, but I believe it is located somewhere clandestine like behind the right kick panel.

I have kind of the same problem, except that sometimes it comes on after a while. Don't know what's the problem, but if the OBC needs replacing, I would just ignore it since they cost like a fortune. Would be great if someone knew how to fix this thing, it's kind of annoying when you start the car, not to be able to see in what gear you're in etc.

Thanks to all in advance for all the help keeping this old bmr running.

Problem: OBC no working at all, no light, nothing shows on the obc display or at the Cluster when click with the light lever.
Is there a fuse I dont know about?
Where is the connection behind the instrument cluster?
Do I have to remove it?
Please help!!
Car runs ok, no messages.
1988, 91K, 735i

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