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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Component Tests (1995) >> Tachometer Test >> Tachometer Does Not Operate

Tachometer Does Not Operate

  1. Turn ignition on. Activate diagnostic test mode No. 3. See ON-BOARD DIAGNOSTICS (1995 MODELS)  under SYSTEM TESTING. Tachometer needle should go to vertical position. Check ignition ECU by reactivating test mode No. 3 on diagnostic unit "A", but placing socket in terminal No. 6. See Figure . If tachometer needle again goes to vertical position, tachometer circuit is okay.
  2. If tachometer does not operate at all, check for short circuit to ground in White/Black wire between 30-pin connector terminal A11 and ignition ECU connector "B" terminal B29. See Figure . If wiring is okay, replace instrument cluster.
  3. If tachometer does not operate in diagnostic test mode No. 3, check for open circuit in White/Black wire between instrument cluster 30-pin connector terminal A11 and ignition ECU connector "B" terminal B29.
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