Trailer Wiring Harness Installation - 2016 Ford Explorer

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How to Install a Trailer Wiring Harness on a 2016 Ford Explorer

Today on our 2016 Ford Explorer, we're going to take a look at, then show you how to install the Curt T-Connector Vehicle Wiring Harness with the 4-Pole Flat Trailer Connector, part number is C56172. This is what our wiring kit's going to look like when we pull it out of the package. This is a really nice, easy, straightforward kit to install. You can see our 4-pole trailer connector. That's our main goal. That's going to give us our right brake and turn, left brake and turn, our running lights, and also our ground.

It's going to provide great power to run a trailer, cargo carrier, whatever we may be attaching to the rear of our vehicle. Now you see that's going to run through a wire loom here, right up to what they call our T-connector plug. This is going to plug right into our factory connector at the rear of the vehicle. It's a very, very convenient way to get a 4-pole on the back of your truck, very easy to do even laying in your driveway. Now here you see an attached ring terminal. That's going to provide the ground for our plug.

To secure that we'll use the provided self-tapping screw here. You'll need 1/4-inch socket or a 1/4-inch bit driver to get that in place. We're also going to have instructions. We'll have a dust cover that's going to fit on the end of our plug that'll keep out any dirt, any moisture that might cause corrosion, and they've provided us with a couple zip-ties in case we need to get it secured up and out of the way. Typically with the zip-ties, I use a couple that are a little bit longer than what's provided. Now, you could stick two of thee together, but if you want it to be a little bit cleaner, you might have a couple of long ones, about 13 to 15-inch zip-ties available to go around the hitch tube itself.

Now to begin our installation, we're going to find our factory connector, so we're going to come just outside of the passenger side tailpipe there, and you'll see this black connector right there on the side, easy to get to, a little black tab right there. We want to push that down and then pull to separate. I'm going to make sure that that's free of any dirt or debris. Now we grab our wiring harness. Now the factory plug that we pulled off there, we're going to put just a little bit of dielectric grease in. This is part number 11755.

It's going to just keep out any moisture or any dirt that tries to get in there and cause corrosion, and we're going to plug that right back on. Now sometimes there are wires that run out of here and continue on to the rear bumper, so if that's the case, you just want to get that plugged back in. Now our other side here, that's going to go right back in to the factory connector still attached to the vehicle. Again, a little dielectric grease there for some protection, plug that in until you hear it click, and then you should be able to pull on it without it coming loose. Now at that point, if this doesn't continue on, I like to hold it back and we're just going to use one of those longer zip-ties to keep it up and out of the way. Now a pair of side cutters would be a good idea. That way you can trim off any excess that you might have. You can see right here there's a little hole. That's where we can use one of the shorter zip-ties provided with our kit. We're going to bring it through there, and we can use that as a good anchor point for our wiring. Now the ground, I'm going to bring that up and we're going to be connecting that end right up in there, that double thick steel. Again, 1/4-inch socket or bit driver will do the job here. I like to use that self-tapper to create the hole first. Once the hole's created, we can attach our ring terminal to it, and place it back in and then snug it down. Now we want that secure enough so if we try to wiggle it, that ring terminal's not going to move. Now we'll tuck our wire loom right up over top of that hitch. That's going to give us plenty of room, keep us away from the exhaust there, and we want our 4-pole to ultimately end up right over by the receiver tube opening on our hitch. Zip-tie it off right there, a couple spots, and that'll be perfect. Now what I like to do is take that dust cover, we're going to place that around the plug, and I like to use this to hold our wiring up into position. That way we won't ever have to worry about it hanging down or kind of slipping behind the vehicle as we drive. Now to test our wiring out we're going to use part number I26, just a simple 4-Pole tester. We'll plug that in, and we'll start with our running lights, our left blinker, our right blinker, and our brakes. Now with everything working as it should, that's going to complete our installation of the Curt T-Connector Vehicle Wiring Harness with the 4-Pole Flat Trailer Connector, part number is C56172, on our 2016 Ford Explorer.

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Info for this part was:

Installed by:
Jeff D
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Video Edited:
Andrew L
Test Fit:
Shane T
Video by:
Alan C
Test Fit:
Randy B
Video Edited:
Chris R
Test Fit:
Andrew S
Test Fit:
Brent H
Video by:
Jonathan Y

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