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Ron Stygar Carl Buckland Dale Beuning Forums Help

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From digest.v5.n179 Tue Sep 3 18:38:07 1996
From: Rick Wargo <rickers_at_lmi.com>
Date: Tue, 3 Sep 1996 20:17:56 -0400
Subject: RE: OBC lights

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Steve asks:

> The display on my OBC in my '88 325is has gone out. The LEDs are =
still

> forming the numbers, but you have to put your face real close, which =
is

> tough when driving, just ask the busload of Nuns I ran off the road. =
I

> know this has been covered, but does anyone have a procedure document
> for changing the display bulb. I have not attempted yet, but want to =
know

> how to remove the OBC display/control panel. Please tell me I don't
> have to remove the whole dash.=20

I did this just the other day. I was in there mucking with the wires = for my stereo (sony replacement), put everything back together, and the = OBC lights were dim. Couldn't figure out what had happened. Finally, = the last thing I did was to check the bulb behind the OBC. Actually, I = did this first and it did not *appear* to be bad... After wearing out = my patience, I checked the bulbs again and one was bad. Picked a = replacement up at the dealer and it cost over $21!!! =20

Here's how I did it....

I believe that the OBC was screwed in there, but you might try (ever so) = gently prying it out first. If that works, then ignore the rest of = this.

To remove that panel, there are four screws to be removed, one behind = the hazards flasher, one behind the plate to the left of the defroster, = and two bolts under neath, one under the fan speed controller and one = under the temp. adjuster (These two are a real pain!). The vent = switches also hold the panel in there so you have to deal with that, = too. Remove the little slider knobs and a thin plate can be pried off. = You should be able to remove the panel now. Note that the air = conditioning assembly is mounted behind this panel, so don't try to yank = it out with the panel -- it should remain in there. When the panel = comes out, I think there are four screws which hold the OBC on to that = panel. Removing those screws allows easy access to this thing, although = it may not be necessary, I don't remember exactly.

Anyway, now to the good part. On the top right hand side of the OBC is = a funky area which allows you to pull it out with pliers. What comes = out is the back-lighting display for the OBC. It has a small = circuit-board with a bunch of plastic supporting it and two small bulbs. = Check those bulbs carefully and also make sure the traces on the = circuit board are still intact. If you find that this is the defective = piece, as I did, you can do one of two things: replace that piece (at a = cost of $21.??) or try to put new bulbs on it, which would be much = cheaper. Anyway, it should be an easy task. While you are at it, there = is another light behind the OBC in the back in the center. I wasn't = quite sure what that did (does anyone know?) I replaced that, too = because the price was right. Get this, from the dealer, that light was = available and it was less than $1.00!!!!! I couldn't believe it-I had = the parts guy re-check the price. He told me that BMW was having a = bunch of problems with that light and that was the reason it was so = cheap. So, I replaced it, too, although I don't believe that it needed = fixing.

After putting everything back in the way you got it out, all should be = as good as new!

Good luck!

rick wargo
1992 325iC - newly cleaned and within minutes destroyed by parking near = the beach!

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