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Home >> Chevrolet >> 1998 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel Displays & Instrument Panel Gages >> Symptom Tests >> Tachometer Gauge Inoperative Or Inaccurate

Tachometer Gauge Inoperative Or Inaccurate

  1. If vehicle has been checked for Diagnostic Trouble Codes (DTCs), go to next step. If vehicle has not been checked for DTCs, go to TESTS W/CODES article in ENGINE PERFORMANCE section.
  2. Check for open, excessive resistance, electromagnetic interference or short (to ground or battery) in circuit No. 121 (White wire) between instrument cluster Black 18-pin connector C2, terminal "H", underhood accessory wiring junction block and Powertrain Control Module (PCM) Clear 80-pin connector C2, terminal No. 8. Repair as necessary and recheck system operation. If circuit is okay, go to next step.
  3. Replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Recheck system operation.
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