![]() ![]() You can worry that a 4 pin and 7 pin adapter just aren’t compatible and the stress sets in, how will you tow your trailer now?īut there is no need to worry! As you can use a 4 pin connector to tow a 7 pin trailer with ease. But it isn’t as difficult as you might think. Leave a comment to provide tips of your own or subscribe below to receive notification about future blog posts.When it comes to powering your trailer and its RV functions, many of us can freeze and panic. Repairing the 7-pin trailer cord plug and replacing the 7-pin outlet in the truck are two good places to start if ever you encounter issues with your controller. Whether you have hydraulic disc brakes on your trailer, or traditional electric drum brakes, your controller is your lifeline for stopping safely. If your controller doesn’t have such a display function, get yourself a Tekonsha P3! They have models to fit all tucks. Check to see that you have no error messages on your brake controller. Plug your newly re-wired cord into your 7-pin trailer outlet and test all your lights, including hazards and reverse. Tighten it in place with the larger set screw. Insert the crimp connector into the slot in the plug cover. This will ensure all wires in the cord connect to the correct terminals in the outlet. It will likely only fit together one way. Important: Align the slot in cover with the groove in the plug and tighten to set screw to attach the two parts. Slide the whole cord through the narrow end of the plug housing so the colored wires come out the wide end. Insert cord into plug and attach center wire. ![]() Expose enough copper for each color wire to connect new plug.ģ. I trimmed back approximately 1″ off each wire, and removed enough rubber shielding to allow me to easily manipulate each colored wire into the new plug. ![]() The length of copper to expose may differ depending upon your replacement plug. Use wire strippers to remove the shielding from each wire. I just wanted to identify the colors first to make sure they were all different. 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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