The trailer needs to be hooked up to your truck’s or SUV’s electrical systems. Towing a trailer is a bit more complicated than just hooking the trailer onto a hitch and setting off. What are the trailer and towing parts and where are they located? Check your owners manual to be certain that is the set-up for your model. Leaf Spring Shackles and Bracket Repair That should give you juice to the trailer plug.Alarms, Control Modules, & Remote Start.Timing Belts, Timing Chains & Components.The easiest way to replace a 4-pin plug with a 7-pin plug is to use a wiring kit that makes the change from 4 wires to 7 as seamless as possible. Can I Change My 4-Pin Trailer Plug to a 7-Pin Trailer Plug? So, while the 7-pin trailer plug provides the wiring to control the brakes, to engage/control the brakes, a brake controller in the towing vehicle is required. These plugs also have a separate wiring pin to control only the brake lights. In fact, on some 7-pin plugs, more than one wire provides a signal for braking.įor example, some plugs have a single wiring pin that controls the left turn signal AND brake lights and a single wiring pin that controls the right turn signal AND brake lights. The plug does, however, control multiple light functions, including the brake LIGHTS. A brake controller is necessary to actually modulate/control the brakes for this purpose. It simply provides a connection between the towing vehicle and the trailer. A 7-pin trailer plug does not, itself, control or engage the brakes themselves. Does a 7-pin Trailer Plug Control Brakes? You can use the top of the plug to orient you to the locations of the pins, each of which corresponds with a different function. This may help in orienting the wiring based on the location of the pins. That raised piece should be at the top of the plug. There is a raised portion on the circular plug. So, the most important thing to do when wiring in a new 7-pin plug is to make absolutely sure you’re coordinating the proper pin/wire with the proper function. Relying on wire colors may not be appropriate as different plugs use different wire colors for different functions. It’s always best to coordinate your plug blades/wires with the appropriate functions rather than by wire color. This is frustrating, but it’s an important fact to keep in mind. It’s also important to know that not all manufacturers color-coordinate their plugs in the same way. The answer to this important question is no.įirst of all, there are different types of 7-pin trailer plugs in general – not all are wired for RVs. It’s important to note that not all 7-pin plugs will be wired according to this same color pattern. The trailer 7-pin plug would actually stay in the truck receptacle without the receptacle cap retaining pawl. The trailer to tow vehicle 7-pin connector was never a problem. The raised piece of the plug, shown on the top of the plug in this photo, can help to orient you to the pins. Troubleshooting Trailer 7-Way Plug that Wants to Disconnect from Vehicle Connector Question: I pulled my 2014 Airstream 25 foot trailer with a 2015 diesel Ford Excursion. For this reason, it’s important to wire according to function as opposed to color. Note that not all 7-pin trailer plugs, and in fact not all RV plugs, are wired to the same color pattern.
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