GM Service Manual Online
For 1990-2009 cars only

Voltmeter Reading High/Low

Step

Action

Value(s)

Yes

No

DEFINITION: Voltmeter Indicates High Or Low Voltage

1

Has the Charging System Check been performed?

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Go to Step 2

Go to Charging System Check

2

  1. Start the Vehicle.
  2. Connect a voltmeter across the battery terminals.

Is the reading on the voltmeter at the specified value?

12 - 16 volts

Go to Step 3

Go to Step 4

3

Replace the instrument cluster. Refer to Instrument Cluster And Gages, in Electrical Diagnosis.

Is the repair complete?

--

Go to Charging System Check

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4

Perform Generator Replacement. Refer to Generator Replacement .

Is generator replacement complete?

--

Go to Charging System Check

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