For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Verify that the flash to pass (FTP) is inoperative. Does the FTP operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 | Do the high beam headlamps operate normally? | Go to Step 4 | Go to Symptoms - Lighting Systems
4 |

1. Turn the key to RUN with the engine OFF.
2. Connect a fused jumper from ground to the flash to pass switch signal terminal of the turn signal/multifunction switch connector.

Do the high beam headlamps illuminate?

Go to Step 6

Go to Step 5

5 | Test the flash to pass signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 10 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 9
7 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 8
8 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | --
9 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the repair? | Go to Step 10 | --
10 |

1. Use the scan tool in order to clear any induced DTCs.
2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3