Why does my trailer plug have 5 wires?

A trailer with a 5-wire harness has connections for marker, brake and signal lights as well as an electric braking system. By reducing a 5-wire to a 4-wire you eliminate the connection for the trailer’s brakes.

What color wire goes where on a 7 pin trailer plug?

What is the Color Code for 7-Way Trailer Wiring?

Green: Right turn/brake light.
Yellow: Left turn/brake light.
Brown: Tail/running lights.
White: Ground wire.
Blue: Brake controller output.
Black: Battery hot lead.
Purple: Reverse lights.

What is the black wire on a 7 pin trailer plug?

The black wire of the Hopkins 7-Way Molded Trailer Wire Connector # HM20048 carries the 12 volt accessory circuit. This is the circuit that will typically power interior lights or charge a trailer’s battery.

How do you wire a 7 pin trailer plug with 5 wires?

When wiring a 7-Way on your trailer with 5 wires, your green wire will be right turn/brake, the yellow wire will be left turn/brake, the brown wire will be the taillights, and the white wire will be the ground.

Can you plug a 4 pin into a 5 pin trailer plug?

If the 4-pole and 5-pole connectors on your vehicle and trailer are the flat style connectors, then you could simply plug the 4-pole trailer connector into the 5-pole vehicle connector. If you did not want to add trailer brakes, then you could simply tie off the brake wire and tuck it away.

What is the difference between 4 pin and 7 pin trailer plug?

The only real functional difference between them is that on part # 37185 the 4-pole trailer connector is located to the side of the 7-way, rather than under it as with # HM47180. Both adapters plug in at an existing 4-pole vehicle connector and re-format those lighting signals to the 7-way configuration.

How does a trailer surge brake work?

In contrast, Surge Brakes are hydraulic and use the trailer’s natural momentum to actuate the brakes. When you step on the brake in your tow vehicle and slow down, the trailer pushes against the hitch and presses a hydraulic cylinder. The more you slow down the vehicle, the more pressure on the trailer brakes.

What is a 7 way plug for a trailer?

The 7-Way Trailer Plug is around 2″ diameter connector that allows an additional pin for an auxiliary 12-volt power or backup lights. It is usually used for towing a heavy-duty landscaping trailer, car trailer, boat trailer, horse trailer, travel trailer, construction trailer, and larger trailers.

What are the 7 pin connectors?

Light vehicles, common connector types 7-pin round blade connector (SAE J2863) This is common for RVs and other large trailers which have additional loads beyond the basic for tail lights and brake/turn signals. 6-pin round connector. This contact occurs on medium duty trailers that have both reverse lights and electric brakes. Flat 5-pin connector. Flat 4-pin connector.

What is a 7 pole trailer connector?

This standard, RV-style, 7-pole connector provides a secure connection between your trailer and tow vehicle. Black plastic construction prevents rusting, enhances appearance and makes plug removal a snap.

Why does my trailer plug have 5 wires? A trailer with a 5-wire harness has connections for marker, brake and signal lights as well as an electric braking system. By reducing a 5-wire to a 4-wire you eliminate the connection for the trailer’s brakes. What color wire goes where on a 7 pin trailer plug?…