Tekonsha T-One Vehicle Wiring Harness Review

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Review of the Tekonsha T-One Vehicle Wiring Harness

Today we're going to be taking a look at the Tekonsha T1 vehicle wiring harness with four pole flat trailer connector. As always, you want to use our fit guide to ensure that you're ordering the correct component for your vehicle.This is what our wiring harness is going to look like when it's installed on our Pacifica. It's going to provide you with all the necessary lighting, which includes your left turn signal, right turn signal, tail lamps and brake lamps, keeping you DDOT compliant and all states. Connector itself is a standard four pole flat trailer connector and has a dust cap that comes included pre-installed onto the connector end. This keeps out any dirt, debris and moisture, ensuring a long lasting connection. Additionally, you can use it like we are here to keep it secured to your hitch so it keeps it up out of the way and off the road preventing any damage occurring to it when you're driving down the road when it's not being used.This harness is a module that's pre-installed in it.

The module reads the signals from your tail lamp assemblies and then sends those signals to the four pole connector that goes to your trailer. What's nice about this is this module has it's own power supply. It's fuse protected, so the signals that are going to your four pole connector are from the module and not from your vehicle. If there's any shorts or faults with your trailer, the module will shut down the circuit and protect your vehicle from any damage to it because of the shorts.It puts out 4.2 amps on our stop turn circuits and 7.5 amps on our tail lamp circuits. This is a pretty high amperage rating for your typical wiring harnesses, so this should be able to power plenty of lights on even your larger trailers.It's a quick and easy install that doesn't require any cutting or splicing of your existing wiring.The module box will mount on the outside at the back on your driver's side.

We've put ours next to our bumper beam here. Then from our module box, you're going to have several wires you'll need to connect. You will have two connectors that go to each side. On our driver's side here the connector goes between our factory connector over here and the tail amp assembly here. It's going to be the same on your passenger side.

That's going to be the green circuit over on the passenger side. It's the yellow brown here on our driver's side.You can simply route this wiring up from below through the opening back here using a fish wire. We used a piece of airline tubing as a fish wire, but you can use anything that's flexible but also has some rigidness to it to keep it straight enough to get it down.Then you'll take the black wire that's coming off the module. You'll extend that using the black wire that comes in your kit and route that up to your engine compartment. That's going to connect to your fuse harness that comes in the kit here and connect to your positive post on your battery.

There's a fuse that comes included with it. For this particular module, it's 15 amps and you'll just insert that once you've got all your connections made.If you're wondering about the ground, there's a white wire that comes off of the module and you get a self tapping screw included with it and you can just run that into the bottom of the frame anywhere underneath the vehicle back there near the module. We mounted ours into the bumper beam.Now as you can see with our tester plugged here, we have our left turn signal, right turn signal, tail lamps and brake lamps.Customers on our website compare this to Curt's T-connector vehicle wiring harness with four pole flat trailer connector. They're similar in just about every way. The only difference between the two is that the Curt only has three amps on the stop turn circuit while the Tekoncha has 4.2 amps and the Curt has six amps on the taillight circuit, while the Tekonsha has 7.5 amps. If you need that extra output for a bunch of lights and stuff on your trailer the Tekonsha's probably the better one for you.That completes our look at Tekonsha's T1 vehicle wiring harness with four pole flat trailer connector.

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Info for this part was:

Video Edited:
Jacob T
Video by:
Kathleen M
Video by:
Dustin K
Installed by:
Cole B
Test Fit:
Randy B
Video Edited:
Chris R

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