Schematic Reference: Instrument Cluster Schematics

Did you review the Instrument Panel, Gages and Console Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

Verify that the tachometer is inaccurate or inoperative.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Turn the ignition switch to the ON position.
2. Using a test lamp, check the instrument cluster assembly C1 cavity 2 to ground. Refer to Instrument Cluster Replacement for access.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

1. Start and Idle the engine.
2. Obtain normal operating temperature.
3. Check connector C3 cavity 3 of the instrument cluster, measure the frequency of the tachometer .

Is the measured frequency within the specified range?

Go to Step 9

Go to Step 6

Replace the instrument cluster assembly printed circuit. Refer to Printed Instrument Cluster Circuit Replacement .

Is the repair complete?

Go to Step 11

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Using a test lamp, check junction block 3, C2 cavity 18 to ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 8

Repair the open in the RED/BLU wire between the junction block 3, C2 cavity 18 and the instrument cluster assembly C1 cavity 2. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 11

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Replace the junction block 3. Refer to Instrument Panel Wiring Harness Replacement .

Is the repair complete?

Go to Step 11

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Inspect the instrument cluster assembly printed circuit for damage.

Is any damage visible?

Go to Step 5

Go to Step 10

Replace the tachometer. Refer to Tachometer Replacement .

Is the repair complete?

Go to Step 11

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3