![]() The additional wire is tapped into the backup lights to disengage the hydraulic trailer coupler (actuator) when the vehicle is reversing, turning off the trailer's brakesĦ-Way connectors allow the basic hookup of the three lighting functions (running lights, turn signals, and brake lights) The ground and two extra pins provide two additional functions, typically for electric brakes and 12 volt "hot" lead.ħ-Way connectors allow hookup for running lights, turn signals, brake lights, and additional pins for electric brakes, 12 volt "hot" lead and backup lights. According to Wikipedia, in Europe, both 7-pin and 13-pin are common. Right: A chart showing typical trailer wiring configurations and wire colors. The trailer connector (trailer cable) systems include plugs, sockets and cables. Four-way wiring is quite common and is suitable for most light-duty trailers and boat trailers. Seal out dust and moisture and allow access to thermocouple and RTD sensor connections. The connector is 2 in diameter and is often found on heavy-duty trailers such as RVs. Mount to RTD connectors to stabilize connections between RTD wires and screw terminals. A 7-pin plug (sometimes referred to as the 7-way trailer connector) is the connector and heavy-duty wire that brings the necessary power and related functions to the trailer you’re towing. These four types of wires together constitute what is known as four-way wiring. In order to do that, there must be power to the trailer. Not sure which is the correct plug style for your trailer? See our selection of trailer end wiring connectors while taking the following into consideration:Ĥ-Way connectors allow the basic hookup of the three lighting functions (running lights, turn signals, and brake lights) and one pin is provided for the ground wire.ĥ-Way connectors allow the basic hookup of the three lighting functions (running lights, turn signals, and brake lights) a pin for Ground, and also one additional pin is available to provide support for surge brakes or hydraulic brakes. White is ground, and brown is for the trailer’s taillights. The color the column is highlighted in, is the color of the plug. Youll need a 4-pin wiring kit thats 20 ft or more in length. MECMO 4-Way Flat Trailer End Connector 25 Inch, 18 Gauge Color Coded Trailer Wiring Harness, Trailer-Side 4-Pin Towing Harness Male Connector - 25 Inches. Along with trailer wire connectors, we have all sorts of wiring supplies, such as mounting brackets, bullet splices, ring terminals and insulated terminal kits. Installing a 4-pin connector to your trailer is a simple project you can complete in an afternoon. ![]() The more pins in the connector, the greater the number of functions it can handle. Did you know the most common trailer end plugs are 4 way, 5 way, 6 way and 7 way? This wiring information chart will show you how to determine each plug style and what it is used for. 7-WAY RV BLADE TO 7-WAY PIN TYPE ADAPTER 53506 Other Hopkins 47595 7 Blade to 7 Round Pin Adapter. The most common trailer connectors have four, five, six or seven pins. ![]()
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