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Home >> Mazda >> 1987 >> 626 Base >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel - Standard >> Component Testing >> Tachometer
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Component Testing: Tachometer

Connect a test tachometer to the negative terminal of the ignition coil. Start engine and compare vehicle tachometer with test tachometer. Vehicle tachometer performance is acceptable if unit is within 1% below or 6% above actual engine RPM.