For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Engine Controls Schematics Connector End Views Reference: Engine Control Module Connector End Views for the 4.6L engine, Engine Control Module Connector End Views for the 3.6L engine, or Component Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Turn ON the ignition, with the engine OFF. Does the battery charge indicator illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Shut OFF the engine.
2. Disconnect the generator harness connector.
3. Connect a test lamp between the generator turn - on signal circuit and ground.
4. Start the engine.

Is the charge indicator light ON?

Go to Step

Go to Step 4

4 | Test the generator turn on signal circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 5
5 | Inspect for poor connections at the harness connector of the engine control module (ECM). Refer to Connector Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 6
6 | Place the ECM. Refer to Control Module References . Did you complete the replacement? | Go to Step 7 | --
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2