Possible Causes
WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
RIGHT REAR SPEAKER
LEFT REAR SPEAKER
AMPLIFIED REAR SPEAKER CIRCUIT SHORTED TO GROUND
AMPLIFIED REAR SPEAKER CIRCUITS SHORTED TOGETHER - TEST 1
AMPLIFIED REAR SPEAKER CIRCUITS SHORTED TOGETHER - TEST 2
AMPLIFIED REAR SPEAKER CIRCUITS SHORTED TOGETHER - TEST 3
AMPLIFIER