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Instrument Cluster Speedometer Inoperative

  1. Disconnect instrument cluster Gray, 24-pin connector. On Malibu, disconnect radio Gray, 10-pin connector C1. On all models, disconnect left instrument panel wiring harness junction block Brown, 68-pin connector C1. Using DVOM, check resistance between instrument cluster harness connector terminal A8 (Dark Green/White wire) and left instrument panel wiring harness junction block harness connector C1 terminal E6 (Dark Green/White wire). See Figure . If resistance is 0-2 ohms, go to next step. If resistance is not 0-2 ohms, go to step  3 .
  2. Reconnect left instrument panel wiring harness junction block connector C1. Disconnect cruise control module connector. On 2.4L engine, disconnect PCM Black, 80-pin connector C2. On 3.1L engine, disconnect PCM Blue, 80-pin connector C1. On all models, using DVOM to check resistance, backprobe between left instrument panel wiring harness junction block connector C1 terminals E6 (Dark Green/White wire) and F6 (Dark Green/White wire). If resistance measurement is 0-2 ohms, go to step  4 . If resistance is not 0-2 ohms, go to step  5 .
  3. Repair open in circuit No. 817 (Dark Green/White wire) between instrument cluster and left instrument panel wiring harness junction block connector C1 terminal E6. Recheck system operation.
  4. Replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Recheck system operation.
  5. Replace left instrument panel wiring harness junction block. Recheck system operation.
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