![]() ![]() ![]() ![]() Many people get in an accident when they forget to unplug old cables or pull their cables too harshly.Ĭables take constant abuse, and you eventually have to replace them. To avoid accidents, start by being careful with the way you handle the cable. Installing a 7 core wire is a straight-forward process if you prepare in advance. However, if you have a fully-functional large vehicle you will likely have to connect all 7 pins.ħ Core Trailer Wires: How To Prepare For Installation If there's a blank spot, it won't affect the wiring harness. Let's say you decide to install the lights but you don't have any use for auxiliary power or brake systems - you can simply leave those out. If you leave certain pins unused or unconnected, this won’t affect the performance of the trailer. For instance, you could use this wire on a smaller trailer where you only need the first 4 wires - similar to a 4 pin connector. Note: Not all 7 connectors have to be hooked up to the trailer in order for the functionality to work. RED WIRE (sometimes it's black on 7 pin wires): 12V auxiliary power. BLUE WIRE: For the brake system (electric breaks or the hydraulic reverse disable). GREEN WIRE: For right turn and stop signals. YELLOW WIRE: For left and right turn signals. BROWN WIRE: Power to the taillights and license plate. If you're wondering what the 7 core trailer wire stands for, here's a breakdown of the functionality based on the color: Only 6 pin connectors come close to the functionality of a 7 pin connector, but they are not as widespread. Smaller 4 pin connectors can only power the lights, but the 7 pin connector's additional pins leave room for auxiliary power, backup lights, breaks, and more. The functionality of the 7 pin connector far exceeds that of smaller connectors because it provides the fundamental lighting functionality needed including advanced brake systems. While it started being used on trailers, it is now commonly found on boats as well. ![]() This connector is becoming widespread on all heavy-duty vehicles. Most 7-way trailer plugs have a large 2" diameter connector that provides extra pins for 12V power and backup lights. If you use an older trailer that uses electric breaks and a 6 pin connector, you can replace it with a 7 pin connector for additional functionality. This wire has a lot in common with smaller wires such as 4 pin trailer wires due to the fact it provides the same core functionality but with additional features. The 7 core trailer wire is one of the newest-generation wires that became the go-to wire on all new heavy-duty vehicles. The latter is a round style that has smaller round pins. The most common style is the 'blade' style and it can be found on all the newest trailers. These two variations appear similar, however, you should identify which one your trailer uses before you purchase a new 7 core trailer wire. The 7 core trailer wire provides additional connectivity compared to its smaller sister connectors: The 6 core, 5 core, and 4 core.ħ core trailer wire is the only trailer wire type to have 2 sub-groups: 'Blade' and 'Round'. 7 core trailer wire is used on large recreational and residential vehicles - it is the most advanced connector available that can supply the full range of trailer functionality including taillights, brake lights, turn lights, trailer breaks, reverse lights, auxiliary power, and a ground connection. ![]()
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