The CURT 56438 Vehicle-Side Custom 4-Pin Trailer Wiring Harness is a plug-and-play kit engineered for use with the OE Tow Package on select trucks. It taps into your vehicle’s factory wiring without cutting or splicing, and provides a standard 4-way flat connector that powers trailer tail lights, brake lights, and turn signals reliably.
✨ Key Features:
Model-specific design for a precise fit with applicable vehicles
No cutting into factory wiring — installs using existing connectors
Standard 4-pin flat output to power trailer lighting systems
Includes battery-feed wiring and fuse holder to handle added trailer load
Weather-sealed construction and dust cover to protect the connector from moisture and debris
Backed by a limited one-year warranty for peace of mind.
