Toyota Camry trunk wiring harness issue causing brake lights and trunk lid lights to malfunction on Toyota Camry

Some Toyota Camry owners report experiencing issues with the trunk wiring harness that can lead to malfunctions in the brake lights and trunk lid lights. This problem is more prevalent in older Camry models, particularly in the driver side hinge area where the wiring loom passes through. Over time, the wires in the harness loom may break due to the repeated opening and closing of the trunk, causing them to touch and resulting in malfunctioning lights. Owners are advised to check the wiring harness on the left side of the trunk to identify any issues. In some cases, a wire near the trunk lid hinge may wear through its insulation and intermittently short to ground, affecting the brake lights during vehicle movement. If brake lights are not functioning, it is recommended to test the brake light switch and inspect the wiring harness for problems. Additionally, there is a risk that wiring could melt together or short out, further contributing to brake light malfunctions.