Curt Vehicle Wiring Harness Installation - 2018 Chevrolet Equinox

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How to Install the Curt Vehicle Wiring Harness on a 2018 Chevrolet Equinox

Speaker 1: Today on our 2018 Chevrolet Equinox we'll be having a look at and showing you how to install the Curt T-Connector Vehicle Wiring Harness with a 4-Pole Flat Trailer Connector, part number C56375.Here's what our wiring harness looks like installed. We have an adequate length of wire to reach down by our receiver on our hitch. Now this wiring harness gives us the necessary functions that are required by law in order for us to safely and legally tow a trailer. Our white wire gives us our ground connection that is necessary between our Equinox and our trailer, the brown wire provides our taillight and running light circuit, and on this wire we have a total power output of seven and a half amps, which is more than adequate to tow a trailer with several incandescent light bulbs or basically as many LED lights as we want because LED lights do draw significantly less power. Our yellow wire is our left turn signal and left brake light, our green wire is our right turn signal and right brake light, just like the taillight and the running light wire we have seven and a half amps of power output on each of those wires.What's great about this wiring harness as opposed to other options on the market is that it utilizes our vehicle's factory tow package connector. There is no cutting, no splicing, you don't have to power a module by running a wire directly to your battery.

It's a quick and easy install, it has all the necessary components that you need in order to make it work properly.We have a nice dust cover here which we can use to secure our wiring harness around the safety chain loops to our hitch when it's not in use and this will help protect it from the elements. One thing I like to use is a little bit if dielectric grease inside our connector as well to help better protect it from any moisture which could cause corrosion or a short circuit over the course of time. A little bit inside there you can close the dust cover back up. So with the dust cover closed and the dielectric grease inside there we won't have to worry about any moisture or corrosion for a long time.Now that we've gone over some features we'll show you how to get it installed. To begin our install we'll be working in the center section of our rear fascia, right behind it in this area.

If you look up behind our fascia and on the back side of the bumper beam we'll see our factory tow package connector. We'll grab the connector and pull it down so we can work with it.With our connector pulled down a little bit we'll see this red tab, we'll slide it back, now we can access the black tab that was under it, press that down and pull to separate. With it separated you can see our tabs better now. This is the black tab, you press down to release the lock, this is the red tab that locked it into place that you slid back then pressed down on the back one.This is our tow package wiring harness that'll plug in to the factory connector. We have a red lock tab on it again, once we have it connected we'll slide that forward to lock it into place.

So we'll disconnect the two, that one goes in one way and with it clicked we'll pull back and make sure it's secure and slide the tab to lock it. We went ahead and secured up our excess wire with one of the provided zip ties behind our fascia so we don't have any wire hanging below the vehicle and then we secured our 4-pole flat connector with the dust cover to our safety chain loops on our hitch.Now we need to open our rear hatch. Now on the drivers side of our vehicle we need to locate our rear fuse box which is behind this panel right here. Use a flat head screwdriver to help pry it open. Now behind the cover we'll find two unoccupied relay spots.

In some instances you may need to install a relay if yours has terminals provided in those slots. These relays can only plug in one way, so you'll match them up and if yours is loose like our you don't need to have the relay. If yours is tight leave the relay in place. Check the other one just in case, it's loose too. Some vehicles may have terminals provided you need to put the relays in, in our particular application ours has a factory installed relay for our factory tow package in this spot here and this one actually locks in place so we don't need these but we have them if we need them. Your application may vary.Okay once our relays are installed if we needed to install them we can reinstall our cover. Okay now we'll test all of our wiring out using a 4-pole flat tester, it's part number I26 on our website. The reason we're using this versus just hooking up to our trailer is because if we have a problem with the trailer we won't be able to tell if our wiring's working properly on the vehicle. Turn our headlights on, you can see our taillight and running light function's working properly, do a left turn signal now, right turn signal, step on our brakes. Now we'll use our turn signal while our foot's still on the brake to make sure everything's working properly. All right, everything's working good.That completes our look at and showing you how to install the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, part number C56375 on this 2018 Chevrolet Equinox.

Questions and Comments about this Video


My 2018 equinox hasnt any relays in those spots indicated. Just dummies so I didnt use the relays. Will my lights work properly on thevtrailer?

Etrailer Expert
Reply from Rachael H.

The relays need to be installed for the wiring harness to work properly when pulling a trailer.

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