DEFINITION: The volt gauge in the instrument cluster is accurate, and it correctly indicates a high or low voltage condition.

1. Turn off all vehicle electrical loads.
2. Start the engine and let it idle briefly.
3. Use a J 39200 DMM to measure the voltage from the battery positive (+) terminal to the battery negative (-) terminal.
4. Compare the J 39200 DMM voltage measurement with the indication of the volt gauge in the instrument cluster.
5. Turn the engine OFF.

Is the difference in voltage less than the specified value?

1 V

Go to Step 2

Go to Volt Gage Inaccurate or Inoperative in Instrument Panel, Gauges and Console.

Perform the charging system check and make any repairs indicated by the charging system check. Refer to Charging System Check .

Is the charging system OK?

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Go to Step 3

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Does the volts gauge indicate a higher than normal voltage?

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Go to Step 4

Go to Step 5

Repair the high resistance connection in CKT 2 (RED) between the generator S terminal and the starter solenoid B terminal.

Is the repair complete?

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System OK

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1. Turn the ignition switch to the RUN position (engine not running).
2. Connect a J 39200 DMM from the ALT/START fuse in the engine wiring harness junction block (underhood fuse relay center) to ground.
3. Measure the voltage.

Is the voltage near the specified value?

B+

Go to Step 7

Go to Step 6

Repair the high resistance or intermittent open circuit on the power side of the ALT/START fuse.

Is the repair complete?

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System OK

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Repair the high resistance or intermittent open circuit between the ALT/START fuse and terminal I of the generator connector.

Is the repair complete?

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System OK

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