For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you review the Headlights/Daytime Running Lights (DRL) Circuit Description and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Lighting Systems
2 | Verify that the Twilight Sentinel is inoperative. Does the Twilight Sentinel operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Disconnect the DRL Control Module connector.
2. Turn the ignition switch to the ON position.
3. Connect a test lamp from cavity 1 to ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

4 | Repair the open in the PNK/BLU wire from cavity 1 to S238. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | --
5 | Turn the ignition switch to the ON position, test for open condition from cavity 10 of the DRL to S240. Does an open condition exist? | Go to Step 6 | Go to Step 7
6 | Repair the open in the BLU/RED wire from cavity 10 to S240. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | --
7 |

1. Cover the ambient light sensor.
2. With the key in the ON position, test for an open from the Ambient Light Sensor cavity 1 to S259.

Does an open condition exist?

Go to Step 8

Go to Step 9

8 | Repair the open condition in the YEL/GRN wire from cavity 1 to S259. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | --
9 |

1. Expose the ambient light sensor to a bright light.
2. Test for an open from cavity 4 to S238.

Does an open condition exist?

Go to Step 12

Go to Step 10

10 | Test for an open condition from the DRL Module cavity 6 and S233. Does an open condition exist? | Go to Step 11 | Go to Step 15
11 | Repair the RED/WHT wire from the cavity 6 of the DRL to S233. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | --
12 | Test for an open between the Headlamp relay and the Turn Signal/Headlamp Switch. Is an open condition present? | Go to Step 13 | Go to Step 14
13 | Repair the open. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | --
14 | Replace the Turn Signal/Headlamp Switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 16 | --
15 | Replace the ambient light sensor. Refer to Daytime Running Lamp (DRL) Ambient Light Sensor Replacement . Did you complete the repair? | Go to Step 16 | --
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3