Inspect the vehicle for diagnostic trouble codes (DTCs).

Has the vehicle been inspected for diagnostic trouble codes (DTCs)?

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls 3.1 or Powertrain On Board Diagnostic (OBD) System Check in Engine Controls 3.8

Operate and inspect the speedometer.

Is the speedometer operating correctly?

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Go to Step 3

Go to Speedometer and/or Odometer Inoperative

1. Disconnect the powertrain control module (PCM) connector C1.
2. Turn the ignition switch to the RUN position.

Does the charge warning indicator light?

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Go to Step 4

Go to Step 5

1. Inspect for a short to ground in CKT 25.
2. Replace the instrument cluster if CKT 25 is good. Refer to Instrument Cluster Replacement .
3. Inspect the system.

Is the repair complete?

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System OK

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1. Connect a fused (3 amp) jumper between the PCM harness connector C1 terminal 36 and ground.
2. Turn the ignition switch to the RUN position.

Does the charge warning indicator light?

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Go to Charging System Check in Engine Electrical

Go to Step 6

Inspect for a poor connection or an open in CKT 25.

Did you find a poor connection or open in CKT 25?

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Go to Step 7

Go to Step 8

1. Repair the poor connection or open in CKT 25.
2. Inspect the system.

Is the repair complete?

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System OK

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1. Inspect the warning indicator bulb and bulb connection.
2. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
3. Inspect the system.

Is the repair complete?

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System OK

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