* Body Control Module (BCM): This is the primary controller. It receives input from various switches (headlight switch, ignition switch) and sends signals to the appropriate relays and actuators to control the headlights. The BCM is usually located inside the passenger compartment, often under the dashboard, but its exact location can vary. You'll likely need a wiring diagram to pinpoint it.
* Headlight switch: This is the user interface; it sends signals to the BCM.
* Relays: These are electromagnetic switches that handle the high current draw of the headlights. They are typically located in a fuse box, either under the hood or inside the passenger compartment.
* Actuators (for auto-leveling systems, if equipped): If your Town & Country has auto-leveling headlights, there will be additional actuators controlled by the BCM to adjust headlight aim.
In short: You won't find a single "headlight control module." The control is distributed across several components, primarily the BCM. Accessing the BCM usually requires some disassembly of the dashboard area, and it's not a job for the average DIYer unless you have experience with automotive electrical systems and a suitable wiring diagram. It's generally best to consult a repair manual specific to your 2005 Chrysler Town & Country.
