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Home >> Buick >> 1995 >> LeSabre Custom >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Testing >> Tachometer Test

Tachometer Test

  1. Turn ignition off. Disconnect Electronic Ignition (EI) module connector. Plug Gauge Tester (J-33431) into a wall outlet. Connect Harness Adapter (J-33431-10) to tester. Connect adapter Black wire to ground. Connect adapter Red wire to EI module connector terminal "E" (White wire). Set tester to 54 Mph (60 Hz), and turn power switch on. Turn ignition on. If tachometer reads about 1350 RPM, check EI module connector for good terminal contact. If terminal contact is okay, replace EI module.
  2. If tachometer does not read 1350 RPM, check White wire for an open circuit or short to ground. Check all connectors and instrument cluster connector for good terminal contact. If all circuits are okay, replace instrument cluster.
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