You can cut the plug off before or after you expose the wires. Remove outer shielding without damaging wires. One slice lengthewise, and another around the cord a couple inches from the exposed end-but not all the way through-allowed me to tear off the rubber without cutting into any of the 7 wires inside. I used a box cutter to gently slice through the outer rubber shielding, being careful not to damage the inner wires. Use wire cutters to snip through all wires in the cord close to the plug. Detailed Steps for Replacing 7-pin Plug:ġ. You might get away with replacing all of the above with a decent Leatherman multitool. Got the plug? Grab a few tools and you’re good to go. I chose the Curt 7 Pole Connector, because Curt Manufacturing makes great towing products and I like how this plug uses flat blade pole terminal connectors instead of the common squeeze type that clearly have a tendency to bend over time. New 7-pin plug ready to install on trailer cord. The permanent solution is to replace the plug. The temporary fix was to pry the connectors inside the plug together so they seated more firmly onto the terminals inside the socket. ![]() Loose trailer plug connections cause faulty wiring problems. They were no longer making a tight connection when plugged into the socket. The connectors in the 7-pin plug had become bent and damaged. But this isn’t about that, you can read plenty of P3 reviews on Amazon. I like the Tekonsha P3 much better than our old controller, for various reasons, including the warning message capability. In fact, John came back out and messed with the plug and socket terminals to fix the problem.Īfter messing with the connectors on the cord a few times, I decided to replace the plug and haven’t seen the message since. ![]() The Trailer Disconnected Warning on our new P3 Brake Controller had nothing with the fine job done by Performance Trailer Braking. ![]() If you read my hydraulic trailer disc brakes installation review, you may have asked: did it really go that smoothly? Well, yes. Since I detailed how to replace the 7-pin trailer cord outlet in our Dodge with a previous post, here are step by step instructions to replace the 7-pin plug attached to the cord on your trailer or fifth wheel. One of the first steps when troubleshooting a brake controller warning is to confirm you have a good connection at the trailer cord plug and outlet.
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