GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the Starting and Charging operation and perform the necessary inspections?

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Go to Step 2

Go to Diagnostic Starting Point

2

Turn ON the ignition, with the engine OFF.

Observe the Charge indicator on the instrument cluster (IPC).

Is the Charge indicator illuminated?

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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 generator connector.
  3. Connect a 3 amp fused jumper wire between the Charge indicator control circuit and a good ground.
  4. Turn ON the ignition, with the engine OFF.

Does the charge indicator remain OFF?

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Go to Step 4

Go to Step 5

4

Test the Charge indicator control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 8

Go to Step 7

5

Inspect for poor connections at the harness connector of the generator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair the condition?

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Go to Step 8

Go to Step 6

6

Replace the generator. Refer to Generator Replacement .

Did you complete the replacement?

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Go to Step 8

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7

Important: Perform the set up procedure for the VCM.

Replace the VCM. Refer to VCM Replacement/Programming in Engine Controls - 4.3L

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

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