For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Place the headlamp switch in the ON position.
2. Turn ON the ignition, with the engine OFF.
3. Place the headlamp dimmer switch in the HIGH position.
4. Observe the high beam indicator.

Does the indicator illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 | Using a scan tool, command the high beam indicator on. Does the high beam indicator illuminate? | Go to Step 4 | Go to Step 5
4 | Inspect for a poor connection at the harness connector of the body control module (BCM) . Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 7
5 | Inspect for a poor connection at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 6
6 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | --
7 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | --
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2