GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Charging System Check ?

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Go to Step  2

Go to Charging System Check .

2

  1. Turn the ignition switch to RUN.
  2. Observe the charge indicator during bulb check.

Does the charge indicator turn on during bulb check?

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Go to Step  3

Go to Step  5

3

  1. Disconnect the generator connector.
  2. Attach a fused jumper between the generator connector terminal B and ground.
  3. Turn the ignition switch to RUN.

Does the charge indicator turn on within two minutes?

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Go to Step  4

Go to Step  6

4

Check the generator. Refer to Generator Not Operating Properly

Is the repair complete?

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Go to Step  9

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5

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Step  9

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6

Check CKT 225 (RED) for an open.

Is the circuit OK?

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Go to Step  8

Go to Step  7

7

Repair CKT 225 (RED).

Is the repair complete?

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Go to Step  9

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8

  1. Check the powertrain control module (PCM) connectors foe poor terminal contact.
  2. If OK, replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls - 3.8L OR Powertrain Control Module Replacement/Programming in Engine Controls -4.0L, 4.6L.

Is the repair complete?

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Go to Step  9

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9

  1. Make sure any components removed during diagnosis are installed in place and the all connectors are connected.
  2. Repeat the system check. Refer to Charging System Check .

Is the system check complete?

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System OK

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