1. Run the engine at idle speed.
2. Measure the system voltage across the battery.

Is the voltage outside of the specified range?

11.2-16.5V

Go to Starting System Check or Charging System Check in Engine Electrical

Go to Step 2

1. Inspect for PCM diagnostic trouble codes relative to the charging system, oil pressure or temperature. Refer to Powertrain On Board Diagnostic (OBD) System Check (V6) or Lubrication Specifications (V8) in Engine Controls.
2. Verify that the following conditions exist:

•	The coolant temperature is below approximately 122°C (252°F) for V6 VIN K or below 118°C (244°F) for V8 VIN G.

•	The oil pressure is above 8.3 psi (minimum for pump).

•	Anything below 3 to 5 psi should cause the check gauges light to turn on.

Do these conditions exist?

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Go to Step 3

Go to Instrument Cluster System Check

Inspect for an open or poor connection in CKT 225.

If the circuit is open, the generator will not generate voltage and the vehicle may be running only on battery power.

Did you repair an open or a poor connection?

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Go to Instrument Cluster System Check

Go to Step 4

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Instrument Cluster System Check

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