GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Starting and Charging Schematics

1

Did you perform the Diagnostic System Check for Starting and Charging?

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Go to Step 2

Go to Diagnostic System Check - Engine Electrical

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

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?

--

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?

--

Go to Step 8

Go to Step 7

5

Inspect for poor connections at the harness connector of the generator. Refer to Circuit Testing and Wiring 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 compete the replacement?

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Go to Step 8

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7

Important: Preform the set up procedure for the PCM/VCM.

Replace the PCM/VCM. Refer to Powertrain Control Module Replacement or VCM Replacement/Programming .

Did you compete the replacement?

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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

Go to Step 3