Where is the brake light switch on a 2003 Dodge ram 2500?

On a 2003 Dodge Ram 2500, the brake light switch is located on the brake pedal assembly itself. It's a small cylindrical switch usually mounted near the top of the brake pedal, sometimes behind or underneath it. You'll likely need to look closely and possibly use a flashlight to locate it. It's usually connected to the brake pedal by a small rod or lever.