Troubleshooting Your Left Tail Light

1. Inspect the Yellow Wire:
   • Follow the solid yellow wire from the main trailer plug to the left tail light.
   • Check for any pinched or sliced sections.
2. Check the Ground Connection:
   • Ensure the white ground wire behind the tail light is securely connected to the metal tail light bracket.
3. Examine the Bulbs:
   • If applicable, inspect both bulbs (CEC 1157 & C193) in the tail light assembly.
4. Address Corrosion:
   • If you find excessive corrosion in the light fixture, replacing the entire tail light is recommended.
5. LED Tail Lights:
   • Note that LED tail lights are not serviceable. If some diodes stop working, you will need to replace the entire light.