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Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118723 Review

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Review of Tekonsha Custom Fit Vehicle Wiring 118723


Today, we're going to take a look at the T-1 vehicle wiring harness with this four-way flat trailer connector. This is a custom-fit part. It is designed to fit the Chrysler Pacifica LX and Touring models starting the year 2017. Now on a custom fit part, I always like to recommend to go to our website, use our fit guide, put in your year and model vehicle, and it will show you if this will work for your application. This harness will provide this four-way flat trailer at the back of your vehicle to power your trailer signal lights. This is compatible with the five-way, the six-way, and the seven-way adapters that we do sell separately on our website. This part does connect very quickly and easily.

What you need to do it go to the back of the vehicle, locate the connection points, which will be behind the tail lights, and you'll have these T-connectors, one for each side, the driver's and the passenger's side. You'll plug in these T-connectors to the tail lights, behind the tail lights, and the other end will go in to the wiring harness. You'll have, you'll take this bonded wire with the four-way on it, run that out the back to connect to the trailer, and you'll have these two wires remaining. The black wire is the power wire. That will need to run to the vehicle's battery, and the white wire is for the ground, has the eyelet on it, you want to connect that to a good, clean ground.

Now the Modulite 01:09 right here, this Modulite Power Module will connect right to the battery, and the reason they do that is they want to avoid over-loading your vehicle's electrical system. They want to get the power directly from the battery to operate the Modulite. Again, this four-way right here, the wire they use is a 16-gauge bonded wire, and if you notice, has this nice integrated dust cap so when you're not connected to a trailer, you can just put it over the terminal to protect them from any damage or from the elements. A few specs on this harness: maximum ampage for the stop and turn lights are 4.2 amps per circuit, and for the tail light circuit, it's 7.5 amps. When you order this, everything you get is what's on the table here, and I just want to go briefly how this all connects. They do give you a nice set of detailed instructions that'll tell you how to put it on and even give you some good pictures of where to install it. Basically what you want to do, again, is go to the rear of the vehicle.

You'll start with your Modulite right here, and you'll start on the driver's side. You'll take this T-connector that has the yellow wire in it. THat's for the driver's side. What you do, again, is gain access to the back of the tire, tape the tail lights, remove the plug, plug one of these into the tail light, plug the wiring harness into the other end, and then you'll go over to the passenger side and do the same thing. You'll take this T-connector that has the green wire in it and you'll run the extra length of wire over to the passenger side, same way, unplug your harness from the tail light, plug this into the tail light and the other end into the harness.

With those all attached, go back to your Modulite. Now the Modulite, you want to attach to a surface soit won't bounce around. They do give you a piece of double-faced tape that you can put on it just like that. You can put a screw to hold it in if you'd like, or they even give you an extra-long cable tie to attach it also. Once that's all attached, then you'll just run this four-way out the back to the rear of the vehicle. What you want to do is take your white wire that has the eyelet on it right here, and that you want to connect to a good, clean ground. If there's one nearby, you can connect it. If you need to make your own, they do include this grounding screw. The last wire, again, the black wire, is the power wire. That needs to run to your vehicle's battery to supply the power to this. To do that, you'll take this extra length of wire, and this needs to be run up to the front towards where the battery is. So you'll take one of these connectors, put it on to the power wire, and then connect it to one end of that length of wire. Again, run that all the way up to the front of the vehicle using these cable ties that take up any slack in the wire. Once you get up to the front with the other end of this length of wire, you don't want to connect this directly to the battery yet. You want to run it through this inline fuse holder. Take one of your other but connectors, put it on that end, and connect it to one side of the inline fuse holder, and then on the other end of the fuse holder, you'll take this eyelet connector, put that on there, and attach that to the positive post of the battery. Once that's done, just pop open your fuse holder, use the included 15 amp fuse, put it right in there, put the cap on it, and now your system will be all ready to go. You'll be able to plug this four-way into your trailer and supply the lights on your trailer. That should do it for the review of the T-1 Vehicle Wiring Harness with the four-way flat trailer connector.


Questions and Comments about this Video

Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video by:
Kathleen M
Employee Randy B
Test Fit:
Randy B

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