If the rev counter (tachometer) in your vehicle is not working, it could be due to a faulty connection, a blown fuse, or a malfunctioning sensor. Check the wiring and fuses related to the instrument cluster for any visible issues. If those seem fine, the problem might lie with the engine control unit (ECU) or the tachometer itself, which may require professional diagnosis and repair. It's advisable to consult a mechanic if basic troubleshooting doesn't resolve the issue.
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