However, if you don't have the owner's manual, here's a general approach:
1. Locate the fuse boxes: The 2004 Impala likely has at least two fuse boxes: one under the hood and one inside the passenger compartment (often under the dashboard, near the steering column or on the side).
2. Examine the fuse box diagrams: Each fuse box should have a cover with a diagram showing the fuse layout and what each fuse controls. Look for a fuse labeled "License Plate Lamp," "Tail Lamps," or something similar. Sometimes the license plate lights are on the same circuit as the tail lights.
3. Check for a blown fuse: Once you've identified the potential fuse(s), carefully remove them and inspect them. A blown fuse will typically have a broken filament visible inside the glass window.
4. If you can't find it easily: Consult a reliable online repair manual specific to your 2004 Chevy Impala 3.4L V6. These manuals are often more detailed than the owner's manual and provide diagrams and troubleshooting steps. Pay sites like Chilton or Haynes offer these manuals.
Important Note: Before working with any electrical components, always disconnect the negative terminal of your car battery to prevent accidental shorts or shocks. If you are unsure about any step, it's best to take your car to a qualified mechanic.
