4-Pin Trailer Wiring Diagram: Wiring & Pinout Guide 2026
A 4-pin trailer wiring diagram typically assigns Pin 1 (White) to Ground, Pin 2 (Brown) to Tail/Running Lights, Pin 3 (Yellow) to Left Turn/Brake, and Pin 4 (Green) to Right Turn/Brake. This standard ensures proper signaling for towing basic trailers without electric brakes or auxiliary power. 📌 Key Takeaways The standard 4-pin trailer connector provides…
