GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Verify the fault is present.

Does the instrument cluster operate normally?

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

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the instrument cluster connector and remove the connector combs. Refer to Instrument Cluster Replacement
  3. Turn ON the ignition, with the engine OFF.
  4. Using a test lamp, test between the ignition 1 voltage circuit and a good ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

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Go to Step 4

Go to Step 8

4

Using a test lamp, test between the ignition 1 voltage circuit and the ground circuit (terminal A8). Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 5

Go to Step 7

5

Using a test lamp, test between the ignition 0 voltage circuit and a good ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 6

6

Repair the open, high resistance or short to ground in the ignition 0 voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

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7

Repair the open or high resistance in the ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

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8

Repair the open, high resistance or short to ground in the ignition 1 voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

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9

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

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Go to Step 10

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10

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 3