However, generally:
* Check the interior fuse box first: This is usually located under the dashboard, often near the steering column or glove compartment. Your owner's manual will show a fuse panel diagram identifying which fuse controls the headlights. Often, it's labeled as "Headlights," "Headlamp," or something similar.
* Then check the underhood fuse box (power distribution center): This is located under the hood, typically near the battery. Again, your owner's manual will have a diagram. Sometimes a larger fuse or relay is located here for the headlight circuit.
Without your owner's manual, it's impossible to give a precise location. Searching online for "2009 Dodge Avenger fuse box diagram" might yield a diagram, but always cross-reference it with your manual to be sure. Incorrectly working with fuses can cause further damage.