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Curt Vehicle Wiring Harness Review

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Review of the Curt Vehicle Wiring Harness

Today we're gonna be taking a look at Curt's T-Connector Vehicle Wiring Harness with 4 Pole Flat Trailer Connector. Of course, we always recommend that you use our Fit Guide to determine that you're going to get the appropriate part for your vehicle.This harness is a quick and easy way to get trailer wiring installed into your vehicle. There's no cutting, or splicing required. It's custom fit, and designed to plug right in to your factory tow plug connector. It provides you will all your necessary lighting, which includes your left turn signal, right turn signal, tail lamps, and brake lamps, keeping you DOT compliant in all states.This harness works using your existing factory tow package. The factory tow package in your vehicle runs through the fuse panel, and uses two relays to send the current back to that connector.

The fuses are also located inside your panel here, so your circuits are gonna be protected from your factory fuse panel.Both of the relays that are installed here come included with your kit. You may find on your vehicle that they're already installed with your factory tow package, but not all vehicles come with those. Thankfully our harness kit does, so we've got everything we need to go.This harness is rated for up to 7 1/2 amps on both your stop turn, and tail lamp circuits, so you can ensure that you can power many lights on even your larger trailers.The harness simply plugs into your factory tow package connector. It's easy to do. I'll show you how to do it now.

You'll just need to locate your fuse panel. We have a 19 equinox here that we're using as our example. The location of your fuse panel is in the back. You open the lift gate on your driver's side. We just use the trim panel tool to pop that panel off, and we can install our relays into the open slots here on our fuse panel.

You'll find your panel here on your terrain as well.Some models that have tow packages may already have the relays installed. On ours we don't, so we're gonna need the ones that come in our kit. These relays will allow power to go to the appropriate circuit on your harness that we're about to install.The relays can only be installed one way. If you look at the pins on the bottom, just match those up, and they simply press in. If you look at the cover for your fuse panel here, on the back side there is a labeling for your fuses and relays.

These are going to go into slots K2 and K3. We can then simply reinstall our panel, and now install our harness.To install your harness you'll need to locate your factory tow plug connector. It's pretty close to the center of the vehicle. It is slightly on the driver's side. This is what your connector is gonna look like. You'll see the red locking tab. You should count six pinholes on the dummy plug that's inserted in it.We're just gonna reach up in there. We're gonna pull that dummy plug out by pulling back on the locking tab. Once you've popped the lock tab out, press in on the release tab located just towards the center of the connector from that lock tab, and pull the dummy plug out. This is what our dummy plug looks like. We're not gonna be reinstalling this, as our new harness is gonna plug in where this was.Here's our plug without the dummy plug installed into it. We're simply gonna take our new harness and plug it right into it. We'll push the locking tab on our harness closed to ensure that the connection stays connected. Now, it's a bit of a tight fit up in here. You probably have to pull on the bumper a little bit, just keep your arm in there. If you haven't installed your hitch yet, you may want to consider installing your wiring first because it does give you a little more room to work.Now that your wiring is connected, you can zip tie up the excess, or you could purchase wiring brackets here at There is a dust cap that comes included with your connector, so we can take that dust cap and slide it over our 4 pole end. You can use this to secure it to your hitch if you don't have a bracket. This will help keep it up out of the way.Now with our wire all zip tied up out of the way, it's a good time to test it out. Now you can plug in your trailer, or test it like the one we have here. If you want to purchase a tester, you can get one here at Make sure that you have your left turn signal, right turn signal, tail lamps, and brake lamps, and with everything working properly we're ready to hit the road.That completes our look at Curt's T-Connector Vehicle Wiring Harness with 4 Pole Flat Trailer Connector.

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Info for this part was:

Video by:
Joshua S
Video Edited:
Jacob T
Video by:
Dustin K
Installed by:
Cole B
Video Edited:
Chris R
Test Fit:
Brent H
Test Fit:
Robert C

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