When it is dark enough outside and the exterior lamp control is in the automatic position, the headlamps come on automatically.

The vehicle has a light sensor on top of the instrument panel. Make sure it is not covered, or the headlamps will be on when they are not needed.
The system may also turn on the headlamps when driving through a parking garage or tunnel.
Lights On with Wipers
If the windshield wipers are activated in daylight with the engine on, and the exterior lamp control is in AUTO, the headlamps, parking lamps, and other exterior lamps come on. The transition time for the lamps coming on varies based on wiper speed. When the wipers are not operating, these lamps turn off.
Move the exterior lamp control to
or
to disable this feature.
Daytime Running Lamps (DRL)
Hazard Warning FlashersFront End Inflatable Restraint Discriminating Sensor Replacement
Warning: Refer to SIR Warning in the Preface section.
Warning: Following the deployment of a side impact air bag, inspect the
following parts for damage. Replace these parts if
necessary:
The seat cushion frame
The seat recliner, if equipped
The seat adjuster
The seat back frame
...
Forward Lamp Wiring Harness Replacement
Preliminary Procedures
Remove the front bumper. Refer to Front Bumper Fascia Replacement.
Remove the headlamp. Refer to Headlamp Replacement.
Using a scan tool, check for DTCs.
Forward Lamp Wiring Harness
Tip
Create a work area large enough to lay out the new and old wiring
ha ...
Trademarks and License Agreements
Manufactured under license under U.S. Patent #'s: 5,451,942; 5,956,674; 5,974,380;
5,978,762; 6,487,535 & other U.S. and worldwide patents issued & pending. DTS and
the Symbol are registered trademarks and DTS Digital Surround and the DTS logos
are trademarks of DTS Inc. All Righ ...