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Re: 94 regal speedometer and tach quit working
Well, the speedometer, and Tach are two different circuits, that should not be affected by just replacing a battery, properly....
About the only way to know for sure is to attach a scan tool and read data from the speed sensor and the tach...if you read data from both on the scan tool, then usually the problem is the cluster, or the wiring between the cluster and the ECM.......
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