Diagnosis And Testing - Headlamp Switch: Notes
WARNING: This page is about a different car, the 2004 Dodge Intrepid, 2004 Chrysler Intrepid, 2004 Chrysler Concorde, and 2004 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
Using an ohmmeter, test for resistance values between the terminals of the switch as shown in the HEADLAMP SWITCH RESISTANCE table and (Fig 1).