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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 01-07-2005, 03:06 PM   #1 (permalink)
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1990 325I cabriolet, my display works but does not light up, how do I go about diagnosing this issue
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Old 01-07-2005, 03:21 PM   #2 (permalink)
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Quote:
Originally posted by alfama@Jan 7 2005, 04:06 PM
1990 325I cabriolet, my display works but does not light up, how do I go about diagnosing this issue
[snapback]266418[/snapback]
Check the bulb behind it, part#62111368299
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Old 01-07-2005, 03:41 PM   #3 (permalink)
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Originally posted by egk2+Jan 7 2005, 05:21 PM--><div class='quotetop'>QUOTE(egk2 @ Jan 7 2005, 05:21 PM)</div><div class='quotemain'><!--QuoteBegin-alfama@Jan 7 2005, 04:06 PM
1990 325I cabriolet, my display works but does not light up, how do I go about diagnosing this issue
[snapback]266418[/snapback]
Check the bulb behind it, part#62111368299
[snapback]266431[/snapback]
[/b][/quote]
i think there's more to it than that, the digits are there but they don't light up, i don't think that there's a bulb behind it.
i will also need some guidance on how to remove it
thanks in advance
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Old 01-07-2005, 04:15 PM   #4 (permalink)
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i don't think that there's a bulb behind it.
There sure is.
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Old 01-07-2005, 04:59 PM   #5 (permalink)
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Originally posted by 87 325iS@Jan 7 2005, 06:15 PM
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i don't think that there's a bulb behind it.
There sure is.
[snapback]266466[/snapback]
ok guys i believe, but how do i take apart
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Old 01-09-2005, 06:04 AM   #6 (permalink)
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I have the 6 button one in my 91 318is...Mine has 2 bulbs...I aasume one for the display and the other to light the buttons....
The bulbs are recessed into the OBC. You can not turn them with just your fingers....You will need needle nose plier's to get to them..You will have to remove your glove box to gain access to the OBC. I am not sure if there is enough room to get to the bulbs without "popping" the unit out of the dash....You DO NOT have to remove the entire panel to remove the OBC. It just clips in place, but you will have to unclip it from the backside of the dash, then the OBC will pop out the front side of the cluster....
If needed I could post a few pictures later....
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Old 01-11-2005, 07:08 PM   #7 (permalink)
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thanks, if you have pictures and can post them, it would really be appreciated
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Originally posted by X_WizarD_X@Jan 9 2005, 08:04 AM
I have the 6 button one in my 91 318is...Mine has 2 bulbs...I aasume one for the display and the other to light the buttons....
The bulbs are recessed into the OBC. You can not turn them with just your fingers....You will need needle nose plier's to get to them..You will have to remove your glove box to gain access to the OBC. I am not sure if there is enough room to get to the bulbs without "popping" the unit out of the dash....You DO NOT have to remove the entire panel to remove the OBC. It just clips in place, but you will have to unclip it from the backside of the dash, then the OBC will pop out the front side of the cluster....
If needed I could post a few pictures later....
[snapback]267315[/snapback]
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Old 01-11-2005, 07:09 PM   #8 (permalink)
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thanks, if you have pictures and can post them, it would really be appreciated
Quote:
Originally posted by X_WizarD_X@Jan 9 2005, 08:04 AM
I have the 6 button one in my 91 318is...Mine has 2 bulbs...I aasume one for the display and the other to light the buttons....
The bulbs are recessed into the OBC. You can not turn them with just your fingers....You will need needle nose plier's to get to them..You will have to remove your glove box to gain access to the OBC. I am not sure if there is enough room to get to the bulbs without "popping" the unit out of the dash....You DO NOT have to remove the entire panel to remove the OBC. It just clips in place, but you will have to unclip it from the backside of the dash, then the OBC will pop out the front side of the cluster....
If needed I could post a few pictures later....
[snapback]267315[/snapback]
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Old 01-12-2005, 03:10 AM   #9 (permalink)
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Here are 2 pics of the back of the unit.


[attachmentid=17193][attachmentid=17194]
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On Board Computer-obc1.jpg   On Board Computer-obc2.jpg  
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Old 01-12-2005, 04:04 AM   #10 (permalink)
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Could it be the wiring if the bulb is ok?

My OBC starts messing up the display. it doesn't do this all the time but every now and then. When I push the OBC in the middle it works again the way it should.

The wiring is ok. Could the OBC be busted?
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Old 01-12-2005, 06:28 AM   #11 (permalink)
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are OBC interchangeable.. i have an 11 button one and want to know if its possible to just plug and play an 18 button one.
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Old 01-12-2005, 06:36 AM   #12 (permalink)
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as far as i know, they are. but correct me if i'm wrong
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