7 POLE-BLADE,CAR END, METAL HOUSING-ZINC

🔧 Function

This connector serves as the interface between a towing vehicle and a trailer, allowing electrical signals and power to pass between them.

⚡ What “7 Pole-Blade” Means

• 7 poles = seven separate electrical circuits
• Blade = flat pin design (more modern and durable than round pins)

Each pole carries a specific function:

1. Left turn signal / brake light
2. Right turn signal / brake light
3. Tail / running lights
4. Ground (electrical return path)
5. Electric brake control
6. Reverse / backup lights
7. 12V auxiliary power (for charging trailer battery or powering accessories)

🚗 “Car End”

• Refers to the vehicle-side connector (as opposed to the trailer-side plug)
• Typically mounted near the hitch at the rear of the vehicle

🛠️ Metal Housing (Zinc)

• The connector body is made from zinc (often die-cast)
• Benefits:
  • Corrosion resistance (important for outdoor exposure)
  • Mechanical strength and durability
  • Heat resistance compared to plastic housings

🧩 Overall Purpose

The unit ensures safe and reliable electrical communication between the vehicle and trailer, enabling:

• Proper lighting (legal requirement)
• Brake synchronization (for trailers with electric brakes)
• Power supply for onboard trailer systems