Looking for help with trailer lighting or electrical systems? Download our free troubleshooting and repair guides below to help maintain, diagnose, and repair keep your equipment.
Trailer Lighting Troubleshooting & Repair Guide (PDF, 4.8 MB)
![Defender Troubleshooting Guide [English]](https://petersonlightsandharness.com/wp-content/uploads/2023/04/2023_Defender_Troubleshooting_Guide_MSD-TSG-0123-Z-1.jpg)
Trailer Lighting Troubleshooting & Repair Guide (PDF, 4.8 MB)
![2023 Defender Troubleshooting Guide / Guía De Detección y Resolución De Problemas [Español]](https://petersonlightsandharness.com/wp-content/uploads/2023/04/2023_Defender_Troubleshooting_Guide-Spanish_MSD-TSG-ES-0123-Z-1.jpg)