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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. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 09-08-2009, 10:30 PM   #1 (permalink)
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Talking Gauge Cluster Problem!!

hey guys i am back to the bmw scene after not owning one for some time now anyway i kust bought a 1987 325 its not a is i e or es just 325 lol anyway it has a few issues.....tachometer does not work temp gauge does not work and mpg meter does not work i was wondering if someone can point me in the right direction to fixing these problems i have only owed 1 bmw before this one so yes i am a NOOB lol thanks
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Old 09-08-2009, 11:12 PM   #2 (permalink)
OMFG another one!?
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I'd start with the fuse box.

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Old 09-09-2009, 12:38 AM   #3 (permalink)
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If the fuses do not help. Your most likely going to have to remove the gauge cluster. There are 3 common things that go wrong with those clusters. The first and most common is the battery for the little computer in there goes bad. You can replace it with a standard rechargable, you do have to solder it in however.

The second is the grounds. This I believe may be the source of your temp gauge not working. Check the temp sender first however. It is located on the water outlet and has two leads coming off of it. As for the grounds, when you remove the cluster, you will see two bolts under the temp gauge and gas gauge. Check for corrosion and replace the nuts to be sure of a clean connection.

The last and most serious issue is when solder joints crack and lose connection. This happened to me and I had to re-flow all of my solder joints.

Another thing to check is the pins that the wiring harnesses connect to. They sometimes become corroded.

Finally, you do not need to remove the steering wheel to get the cluster out, you can just be really clever with maneuvering it.
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