![]() 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. ![]() ![]() Yellow = backup/reverse or auxiliary lights.IN GENERAL, this is the wiring scheme you’re most likely to find on 7-pin RV trailer plugs: Let’s take a look at the wires of each of the 7 pins of one RV 7-pin trailer plug, in particular, to see what function is powered by each wire leading to those pins. And yes, these do include the trailer lights. The 7 pins on the plug deliver power/signaling to 7 different actions/connections on the trailer connector. The connector is 2″ in diameter and is often found on heavy-duty trailers such as RVs, cargo trailers, aluminum trailers, dump & landscape trailers, and car haulers. In order to do that, there must be power to the trailer.Ī 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. So, when you’re about to make a turn or when you’re backing up or braking, your trailer needs to indicate these intentions and actions for other drivers to be able to anticipate. ![]() When you’re towing any type of trailer, it’s imperative that your trailer is capable of signaling to drivers behind you what your operating intentions are.
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