Speaker Circuit: Description
WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Sound signals that have been amplified by the stereo component amplifier are sent to the speakers from the radio receiver through this circuit. If there is a short in this circuit, the sound cannot be heard from the speakers even though there is no malfunction in the speakers.