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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118377
Retail:$60.26
Our Price: $41.54
You Save: 31%
Custom Fit Vehicle Wiring

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Tekonsha Custom Fit Vehicle Wiring - 118377
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118377 or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (64)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118377

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Converter
  • Tekonsha

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points in rear cargo area
    • Plug in T-connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your cargo area. You will need to remove the trim panels to access this harness.


Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.


Tail Light Converter

A tail light converter is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. The tail light converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.



118377 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118377 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118377

Average Customer Rating:  4.9 out of 5 stars   (64 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.

by:

Works great, pain to install, running the wire all the way to the fuse box without a lift is a tight task, the mounting tape is garbage, the one I received didn't stick at all. The wire length on the plug to the box was short for my vehicle, but I just mounted the box in a different place, not even close to what the directions say.




by:

Quick service, exactly what I needed, excellent instructions for installation all at a very reasonable price!! Thank You




by:

Exactly what I needed. Shipping was early (thank you). Your hard work to clarity questions was very helpful.




by:
2002 GMC Savana Van

Excellent!!! Direct fit. Hitch and wire harness. Fast and free shipping. A+++




by:

bought several items from etrailer and quality excellent




by:

Sherry was excellent and knowledgeable.




by:
Chevrolet

This harness went directly into my 3/4 ton Chevy. It all fit perfectly, no screwing around cutting and splicing wires. Worked first try, still works perfectly after more than a year.
Though I haven't done so, one could easily remove this to install on a similar vehicle and have your original wiring intact.


Comments
Still great after another year. Buy this for trailering, save yourself trouble and money.
Dr. B - 07/30/2017


by:
2000 Chevrolet Express Van

This harness was genius. It was perfect. With a few clicks, it was done. I don't think it could have been any easier.




by:

Two things make this an exceptional product:

1)
It fits! That's right!!! Everything fit exactly as expected and EXACTLY as the step-by-step instructions and on-line installation video showed. The connectors all matched the OEM side perfectly and the wire lengths were ideal for making it a custom tailored fit. The on-line video showed the best route for routing the wires and exactly where to mount the control module. And - eTrailer included all the necessary mounting hardware, including a mounting tab and screw, zip tie, and double-sided tape for the now hidden control module!

2) e-Trailer's price beat every brick-n-mortar, big box and on-line store!!!

With that said, KUDOS to e-Trailer (1-800-298-8924), Ian W - one of their many very knowledgable sales/support staff, and their management team for putting together an exception line of products and the team to support them!!! Too bad the rating only goes up to 5 stars... I would have given the a 7 out of 5!!!




by:

This wiring harness came with easy to follow directions, I had it hooked up in 30 minutes. It work as promised and I haven’t had any problems. I will definitely go to ETrailer for all my hauling accessorie needs.




by:
2001 GMC Savana

After spending a week looking at couple auto part stores a trailer connector for may work van 2001 GMC Savana, no one has it. One auto service told me that they need to check out wire by wire and take a time. Uhaul may do it but expensive. I jumped on Internet and found the T-One 118377 Wiring Harness from Etrailer.com, cost less than $40.00. It took me only 10 minutes to finish the job. I am really happy with Etrailer super fast service/shipment and very clear instruction. It is excellent place to shop when you need help.




by:
Chevrolet

The Product worked as advertised. They are truly Plug and Play. e trailer is my go to for all things trailer.
The customer wanted a lighting harness that was NOT cut and splice, like i haul, we haul, they haul or whoever they are. The units are installed in Chevy Express
commercial vans and the customer is very happy.




by:
2001 Chevrolet Express Van

Great service and appreciation for the sale. The piece was easy to hook up and actually took the amount of time I thought it would, instead of three times as long like my projects usually do :)




by:

Excellent product, fast shipping, and great support. The helpful videos and information provided show how this company goes above and beyond all others with their installation support.


Comments
We sold the vehicle on which we installed the harness and hitch. Both items exceeded our expectations in both installation and usage. Health and financial matters have taken priority at this time... but we hope to return to following our dream of travel soon. At that time, we will definitely turn to you for our tow equipment.
Lisa M - 06/29/2018


by:
2000 GMC Savana Van

Excellent product excellent service!!! Perfect fit, simple plug and play. Transaction was simple, shipping was fast and their website is very informative. I will definitely do business with etrailer again!




by:
2000 Chevrolet Silverado 1500

Hello,

I was worried that this
would not be a quality product, and wouldn't work. I am glad to say that everything works, and went together in 5 mins. Putting these on a van is pretty easy, and their video really helped. I have a 2000 Chevy Express Van 1500 Cargo, and this a prefect product. Thank you.

By the way I am a real person.


Comments
It has been a year now, and I just received an email about my review, and just wanted to mention my wiring harness is still holding up with no problems. I also appreciate this companies service. Thank you Austin 21, PA
Austin - 08/24/2019


by:
2001 Chevrolet Express Van

This wiring kit is well worth the money. It was very simple to install and pluged right in to the trailer brake wiring kit they sell, which was also worth the money.




by:
2002 Chevrolet Express Van

revived the product.
installed the product.
product
works great....
installed into a 2002 Chevy express van...
did not have any wiring for towing a small trailer...
two thumbs up...




by:

Hitch and harness were perfect fit thanks to Mark




by:
2001 Chevrolet Express Van

The product looks to be of very good quality. It is a answer to a very difficult problem.


Comments
Everything is great fit perfectly and has been working flawlessly!
Melvin P - 08/26/2017


by:
2000 Chevrolet Express Van

If you are looking for an easy to install quality product. Here it is.


Comments
Highly recommended, durable
Mike C - 01/29/2018


by:
2000 GMC Savana Van

Product was delivered before the expected delivery date and it works perfectly. It was easy to connect. I have used etrailer before and once again I would recommend them.




by:
2001 GMC Savana Van

great product just plug in an go ......no wire splicing




by:

very good product.solved my wiring problems,easy installion,fast shipping.




by:
2001 Ram 3500

Exactly as advertised.

ESAY install

Took
me about 3 minutes to install

Directions included but not needed

Plug and play

User friendly

2001 chevy Express 3500 work van



25
64
Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Will Tekonsha Trailer Wiring Harness 118377 Short Out Vehicle Wiring If Trailer Has Short
    The T-One Vehicle Wiring Harness # 118377 that you referenced will not short out the vehicle wiring in the event of a trailer wiring short. It has circuit protection built into the harness. The converter box will short out and fail which would prevent the short from traveling up to the vehicle wiring.
    view full answer...
  • Recommended Wiring Harness for a 2002 GMC Savana Van
    There is definitely something that doesn't seem right here. What I recommend is the Tow Ready wiring harness part # 118377. It will definitely bypass the issues you are currently experiencing. This will provide the 4-Way connector to the back of your 2002 GMC Savana to power your trailer lights. This harness includes the T-one connector that combines the brake and turn signal functions on your 2002 GMC Savana. I highly recommend using dielectric grease to help prevent corrosion from water...
    view full answer...
  • 2002 GMC Savana 2500 Wiring
    The wiring harness needed will depend on whether or not your Savana was equipped with the factory tow package. If you have the tow package, with the connector in the jack storage compartment, you'll need the part 118240, if not, you'll need part number 118377. Links to both of these parts are included below.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2000 Chevy Express Van 3500
    For a 2000 Chevy Express Van that did not come with a factory installed trailer wiring harness/connector you can use # 118377 to add a 4-Way flat to the rear of the vehicle. It plugs in line with the tail light wiring at the back of the vehicle. I have included a link to a video showing an example installation for you.
    view full answer...
  • Amperage of Trailer Wiring Ciricuits on 2000 Chevy Express 1500 4-Way Connector
    No. 2 Volts does not sound correct but 2 amps is within the correct range. The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118377 is my recommendation for your 2000 Chevy Express 1500 and should give you up to 2.1 Amps on each of the turn/stop circuits and up to 5 amps max at the tail lights (brown wire).
    view full answer...
  • Will Draw Tite Trailer Hitch part # 75234 Fit a 2016 Ford Edge Sport
    For your 2016 Ford Edge the Draw Tite hitch part # 75234 is a confirmed fit that would work well for you. Draw Tite test this hitch on your exact vehicle and determined it to be a fit. This is a 2 inch hitch as well. I attached an install video for you to check out as well. For trailer wiring you would want the part # 118377. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop...
    view full answer...
  • Installing a 7-Way Connector in a 2000 Chevy Express Van
    To hard wire your 2000 Chevy Express Van with a 7-Pole connection, first, you will need Tow Ready Custom Fit Vehicle Wiring, # 118377. I have included a link to the instructions below. Basically, you plug in this wiring harness into a taillight connection and run the wires where needed (to the other taillight and then to the rear of the vehicle). With that installed, you will then add Brake Controller 7 and 4 Way Installation Kit, # ETBC7, which will provide you with the 7 pole connection...
    view full answer...
  • Trailer Wiring Recommendations for a 2001 GMC Savana Van
    You will want to go with the Tow Ready Custom Fit Vehicle Wiring # 118377 as it is designed to work on vehicles that do not have trailer wiring. The Replacement OEM Tow Package Wiring Harness # 118240 that you referenced is designed as a replacement harness for vehicles for that have a factory wiring harness. I attached an installation video for the Tow Ready Custom Fit Vehicle Wiring # 118377 that you referenced. Once installed if you need a 7-way trailer connector I would recommend...
    view full answer...
  • Selecting Factory-Style or Aftermarket-Style Trailer Wiring Harness for 2002 Chevy Express Van
    You can check behind the Express van's passenger side trim panel in the rear cargo area to see if it has connection points for factory replacement wiring. Factory 4-pole items # 118240 and # C55240 both use the same type of square connector, shown in the linked image. If you find this type of connector then you have probably have the tow package; if so, you may need to install a fuse or relay to activate it. If you do not have this factory wiring connection point then instead you can use...
    view full answer...
    Image 1 for
  • 4-Way Trailer Wiring Harness For 1999 Chevy Express Van
    We do have a 4-way that fits your 1999 Chevy Express van, but the # 118377 is not a fit. Instead, the correct one will depend on if you need to replace your factory 4-way or if your van did not have a 4-way at all and you want to install one: - Replace Factory 4-Way: Replacement OEM Tow Package Wiring Harness # 118240 - Install 4-Way: T-Connector Vehicle Wiring Harness # C55335
    view full answer...
  • Troubleshooting Brake Controller Installation When Trailer Brakes Do Not Work
    I checked out the purchase orders you have in our system and found the wire harnesses you received. The # 55240 T-connector harness is listed as a fit for the following: 1996 - 2003 Chevrolet Express Van Full Size 1996 - 2003 GMC Savana Van Full Size 1996 - 2003 Chevrolet Express Van with factory 4-flat connector 1996 - 2003 GMC Savana Van with factory 4-flat connector. The # 118377 is a fit for the following 2000 - 2002 Chevrolet Express Van Full Size 2000 - 2002 GMC Savana Van Full...
    view full answer...
  • Trailer Wiring Harness for a 2001 GMC Savanna
    I checked the owners manual online for a 2001 GMC Savanna Van and it does not list any tow package fuses in either the in-cab fuse panel or the one under the hood. You can double-check your owners manual to confirm. If your van did not come with a trailer connector then to add a 4-Way flat you would need # 118377. Then to add a 7-Way you would need # ETBC7. I have included some links that show and explain the ETBC7 installation for you.
    view full answer...
  • Troubleshooting Trailer Brake Lights on Vehicle Side Harness on 2001 Chevy Express Van
    It sounds like there is an issue with the vehicle side wiring. Since you know there isn't a bad fuse, I recommend checking the wiring itself for a short using a circuit tester like # PTW2992 to determine the point where power stops flowing in your wiring. I also recommend checking the ground connection of the wiring harness like # 118240 as a bad ground that isn't bare metal to metal can have one function that doesn't work fairly easily. If you don't have factory wiring, I recommend...
    view full answer...
  • Fitment of Draw-Tite Hitch on 2002 GMC Savana Van
    The Draw-Tite Max-Frame Trailer Hitch Receiver # 75189 should fit your 2002 GMC Savana Van just fine, unless the bumper has been lowered by someone before. All of the hitches that we carry for your van fit the same way. You may have to do a bit of trimming or remove the bumper and mount it in the original factory location. If you need a trailer wiring kit, I recommend # 118377 or # 118240. You will also need # ETBC7 if you want to haul a trailer with 7 pole wiring on it.
    view full answer...
  • Can Tekonsha Prodigy P2 Brake Controller, # 90885, Mount On Lower Dash Slope On 2000 Chevy Express
    Yes, you can mount the Tekonsha PRODIGY P2 Brake Controller, # 90885, on the slope of the lower dash. The Prodigy brake controller can be mounted from 0 degrees to 360 degrees vertically in the direction of travel. The front of the Prodigy has to be horizontal. The Tekonsha PRODIGY P2 Brake Controller, # 90885, will work for 2, 4, 6 and 8 brake systems. If you have the 7-wire Tow Package on your 2000 Chevy Express then you will use the Hopkins Adapter 4 Pole to 7 Pole and 4 Pole, # 37185,...
    view full answer...
  • Recommended 4-way T-One Vehicle Wiring Harness and 7-way for 2000 Chevrolet Express Van
    If your 2000 Chevy Express Van has the tow package then the 4-way wiring harness you will want is the # 118240. If you do not have the tow package then the # 118377 would be the correct 4-way wiring harness for you to get. To adapt these 4-ways to a 7-way plug, you will want the # ETBC7. If you don't already have a brake controller, I recommend the Tekonsha P3 # 90195, because of its easy user interface. The P3 is a proportional brake controller which means it senses how the tow vehicle...
    view full answer...
  • Recommended Trailer Wiring for 2001 GMC Savana
    For your 2001 GMC Savana Van without any trailer connector, you will need a few things to get your complete setup for towing a trailer with electric brakes. For your trailer wiring you will start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118377 which connects to your factory wiring at two points in the rear cargo area. Then use the # ETBC7 kit to give you the 7-way along with the 12v and brake output wiring. I've attached a video and article to assist....
    view full answer...
  • Trailer Wiring Harness For A 2000 Chevrolet Express Van
    When it comes to installing a trailer wiring harness on your 2000 Chevrolet Express Van The T-One Vehicle Wiring Harness # 118377 is the best out of all the plug and play harnesses for your vehicle. The T-One harness are made out of a heavier gauge wire (16 gauge) and will last longer in the elements then the other options that we offer. The harness will plug into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your...
    view full answer...
  • How to Install a Brake Controller on a 2002 Chevy Express Van
    We would be happy to explain how to install a brake controller like # 5504 or # 90885 on your 2002 Chevrolet Express Van but there isn't a pig tail that will fit your van. You will need to hardwire in the brake controller. If your van came with a factory 7-Way trailer connector the blue output brake wire already ran from the back to the front. It is located under the dash near the emergency brake pedal. But the other 3 brake controller wires will need to be hard wired in. The white...
    view full answer...
  • Adding a Trailer Brake Controller to a 2004 Chevy Express Van 3500
    If your 2004 Chevy Express Van came with a factory installed 7-Way trailer connector then the blue output brake wire will already ran from the back to the front. It is located under the dash near the emergency brake pedal. It will connect to the broke controller blue wire. The white wire will go through the firewall and attach to the negative battery terminal. The black wire will go through the firewall, attach to a circuit breaker and then go from the circuit breaker to the positive battery...
    view full answer...
  • What Wiring Adapter is Needed for a Curt TriFlex Brake Controller on a 2000 Chevrolet Express Van
    For a complete brake controller installation, you will need a brake controller # C51140, wiring adapter # C51515, wiring harness # 118377 and our Universal Brake Controller Install Kit # ETBC7. The wiring kit you purchased, The Upgraded Circuit Protected Taillight Converter Hardwire Kit # 119178KIT, will fit your 2000 Chevrolet Express Van and is compatible with the Curt TriFlex Brake Controller # C51140. However, the wiring harness you purchased is not the best option because you will...
    view full answer...
  • Parts Needed to Install a Brake Controller in a 2002 Chevy Express Van
    We would be happy to explain how to install a brake controller like # 5504 or # 90885 on your 2002 Chevrolet Express Van but there isn't a pig tail that will fit your van. You will need to hardwire in the brake controller. If your van came with a factory 7-Way trailer connector the blue output brake wire already ran from the back to the front. It is located under the dash near the emergency brake pedal. But the other 3 brake controller wires will need to be hard wired in. The white...
    view full answer...
  • Parts Needed to Install Hitch, Brake Controller, 7 Way and 4 Way on a 2002 Chevrolet Express Van
    First we will start off with the hitch. I recommend going with the Curt Class III Receiver Hitch, # 13040, for your 2002 Chevrolet Express Van. This hitch receiver bolts directly to the frame of the van with no welding or drilling required. For a t-connector we have the T-One Wiring Harness, # 118377, that plugs directly into your existing taillight wiring without any cutting or splicing. In order to obtain a 7 way at the back of the van, you will need to install a Universal Installation...
    view full answer...
  • Parts Needed to Install a 7-Way Trailer Connector and Brake Controller on a 2001 GMC Savana 2500
    The brake controller and wiring options for a 2001 GMC Savana can be tricky. If you have a bundle of wires in the jack storage compartment, I would ask that you test them for function using a circuit tester like # PTW2993 and label them. If you find that you have 7 wires (left turn/brake, right turn/brake, running lights, 12-volt power, reverse lights, brake controller output, and ground) then you can use the Pollak 7- and 4-Pole Trailer Connector Socket, # HM40975 and Pigtail Wiring Harness,...
    view full answer...

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Info for this part was:

Employee Andrew K
Video Edited:
Andrew K
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
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Employee Isabelle B
Updated by:
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Employee Cole B
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