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Registered
Join Date: Oct 2006
Location: Colorado Springs
Posts: 10
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![]() ![]() Seems my 89 325I has lost its tach and mpg reading. I'm not sure were to begin to trouble shoot Any ideas???? |
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Registered
Join Date: Oct 2007
Posts: 7
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I've seen a lot of info suggesting that the battery on the SI board (located on the back of the instrument cluster) will cause the tachometer and mpg gauge to go crazy or stop working. It can be replaced fairly easily by soldiering new (charged) ones in place.
Last edited by bayardo; 10-28-2007 at 07:05 AM.. |
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Registered
Join Date: Nov 2004
Location: Atlanta
Posts: 773
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The SI board batteries are likely where you will find it.
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