5-Wire Trailer Plug Diagram: 5 Wire Trailer Wiring Guide 2026
A 5-wire trailer wiring diagram assigns White (Ground), Brown (Running Lights), Yellow (Left Turn/Brake), Green (Right Turn/Brake), and Blue (Auxiliary/Reverse). This system adds a fifth wire for functions like reverse lights or auxiliary power, separate from a dedicated electric brake controller signal. 📌 Key Takeaways Pin 5 (Blue wire) typically serves as Auxiliary Power or…
