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

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

Item # 118315

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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118315 - 4 Flat - Tekonsha
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Product Images

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Customer Photos

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. Call 800-298-8924 to order Tekonsha custom fit vehicle wiring part number 118315 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (95)
  • Q & A (127)
  • Videos (4)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118315

  • Custom Fit
  • Trailer Hitch Wiring
  • Tekonsha
  • 4 Flat
  • No Converter

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.


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 along frame rail
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

T-One Connection Location Points

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located beneath your vehicle, along the driver's-side frame rail.


Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


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.



118315 Tow Ready T-1 T-Connector - 4 Wire



118315 Installation InstructionsInstallation Details 118315 Installation instructions

This Product Fits The Following Vehicles

1992 - 2000 Chevrolet C/K Series Pickup

1992 - 2000 GMC C/K Series Pickup

1988 - 2000 Chevrolet C/K Series Pickup Cab and Chassis

1988 - 2000 GMC C/K Series Pickup Cab and Chassis

1988 - 1991 Chevrolet C/K Series Pickup excluding Crew Cab

1988 - 1991 GMC C/K Series Pickup excluding Crew Cab

1988 - 2000 Chevrolet C/K Series Pickup Pickup - 10 inch Deepdrop Bumper

1988 - 2000 GMC C/K Series Pickup Pickup - 10 inch Deepdrop Bumper

1988 - 1998 Chevrolet C/K Series Pickup Pickup - Roll Pan Bumper

1988 - 1998 GMC C/K Series Pickup Pickup - Roll Pan Bumper

1988 - 2000 Chevrolet C/K Series Pickup Pickup - Standard or Step Bumper

1988 - 2000 GMC C/K Series Pickup Pickup - Standard or Step Bumper



California residents: click here


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


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Trailer Wiring Harness Installation - 1994 C/K Series Pickup

Today on our 1994 Chevy Silverado, we'll be installing the Tow Ready T1 Vehicle Wiring Harness with 4-Pole Flat Connector. Part number 118315. Now to begin our install, we'll first go ahead and locate the manufacturer's 4-pole connection on the driver's side of the frame rail. This will be on the inside of the frame. It comes off the manufacturer's harness. Once we locate the connector, we'll go ahead and split the two ends. To do that, we'll pull back on the locking tab and then separate the two connectors.

Next, we can take our new T1 wiring harness that will plug directly into the manufacturer's wiring, plug in the two ends into the manufacturer's connection points. Then we'll take the white wire with a pre-attached ring terminal and secure it directly to the frame, creating the ground for our new 4-pole harness. To do that, we'll use the self-tabbing screw provided with the install kit and run it directly through the bottom of the frame. Now, with our ring terminal secured we can go ahead and take the 4-pole flat connector, run it over the hitch and towards the center of the vehicle and secure it to the chain hold down. Then we'll go ahead and use some zip ties to secure our excess wiring. Now, with the 4-pole connector installed and secured, we'll go ahead and cut off the excess from the zip ties to clean up our install look and we're ready to test our new 4-pole connector. To test it, we'll take our test light, put it on the white wire terminal, which will be the inaudible 00:01:44 terminal for our ground. Our next terminal will be our brown wire for our running light circuit.

Then the yellow wire terminal will be the left turn signal, left brake and the green wire will be the right turn signal, right braking. Now we know our 4-pole connector works. We're ready to hit the road. That is for the install of the Tow Ready T1 Vehicle Wiring Harness with 4-Pole Flat Connector. Part number 118315 on our 1994 Chevy Silverado. .


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118315

Average Customer Rating:  4.9 out of 5 stars   (95 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.

- 118315
by:
2006 Chevrolet Colorado

Yep thats what I ordered. 521165



- 118315
by:
2000 Chevrolet C/K Series Pickup

Easy assembly. No splicing required. Plug and play. 609481



- 118315
by:

I was impressed with the service and the delivery I would recommend the company to anyone looking for products of this type thank you for the fine service and product 672910



- 118315
by:
1998 Chevrolet C/K Series Pickup

Heavier built than basic plug and play 4 way harness. 10 min to install. 666468



- 118315
by:

I was also excited when I received the package and was anxious to put it on. It worked perfect. After searching for it at some of local merchants I tired looking for it on line and found it. Thank you 601076



- 118315
by:
1994 GMC C/K Series Pickup

everything was perfect. Great price, accurate fit for my truck. The Tekonsha trailering wire harness kit went on easily and works perfect. Now when i trailer i have lights for safety. Thanks guys 520059



- 118315
by:
2000 Chevrolet C/K Series Pickup

Was easy to install and works great on my 2000 chevy K3500. 506526



- 118315
by:
1994 GMC C/K Series Pickup

Quick shipping, great price, wiring fit perfectly and works great. What else could you ask for?? :) 502257


Comments

Not a single problem, working just as well as day one.

JOHN r - 04/29/2019

54610

- 118315
by:

This plugged right into my 1990 k1500 shortbed and works perfect. Looks very well made and I’ve had it on for a while and used it quite a lot. 463802



- 118315
by:
1997 Chevrolet Silverado

trailer wiring was high quality and worked well on my 1997 Silverado. 453226



- 118315
by:
1997 Chevrolet C/K Series Pickup

Took 2 seconds to install. 100% satisfied !!! 430213



- 118315
by:
Chevrolet Orlando

product worked great, only thing usps sent my package to orlando then sent it to new hampshire then finally delivered it yesterday, guess priority mail left out the priority, anyway thanks 417596



- 118315
by:
1990 Chevrolet C/K Series Pickup

Great product works exactly like it sho uld 417173



- 118315
by:
GMC

I bought a wiring harness for my 97 gmc truck. It was easy to install and has been working great for me for a year now. Would highly recommend it for anyone looking for a easy great working product. 398786



- 118315
by:
1993 Chevrolet C/K Series Pickup

I received the wire T-harness for the rear lights on my 1993 Chevrolet truck Wednesday and I installed it Thursday, March 23. It was easy to install and it works fine. Thank you for your prompt service. Michael S., Columbia, TN. 358501


Comments

Yes, I installed the wiring t-harness on my 1993 Chevrolet Silverado on 3-23-2017 and it is working fine. I hooked-up my trailer last Thursday and the lights are working fine. I should have purchased it a long time ago.

Michael S - 03/26/2018

36459

- 118315
by:

It was what needed , plug in play no cutting/ soldering. Well worth MONEY! Easy-to- install @level beganer THANKS EVERYONE AT @ETRAILER 356923



- 118315
by:
1996 GMC C/K Series Pickup

Plugs right into factory GM plug 352639



- 118315
by:
1995 Chevrolet C/K Series Pickup

Good quality,good price. Perfect fit 355310



- 118315
by:
1998 Chevrolet Silverado 2500

This pig tell hook right up to my 98 GMC 2500 truck and works well great product. 346546



- 118315
by:
1993 Chevrolet C/K Series Pickup

great product high quality, still in excellent shape 344582


Comments

Great!! No issues at all

Dan - 02/23/2018

35062

- 118315
by:

Plugged into existing wiring and worked perfectly 341271


Comments

Worked great

Charley - 02/13/2018

34695

- 118315
by:

Wiring harness works great! 338826



- 118315
by:
1994 Chevrolet C/K Series Pickup

The trailer light hook-up for my '94 Chevy truck came very quickly, even though I picked economy shipping. I was delighted that it came so fast, but it was a few days before I got the time to install it. I was expecting to take apart my lights and hook in behind the light bulbs like I did on my Ford E250 which was simple enough. (The harness on the E250 is still going strong several years later by the way.) This light kit only took about 15 minutes to install. The instructions were simple and easy to follow. What took the most time was rounding up a couple of zip ties and drilling a little hole to put a ground screw in. This was so quick and very, very easy. I do lawn mowing and landscaping. I use my trailer a lot. The good people at the package store where I bought my trailer were suggesting a person to custom install a light harness on my vehicle for a little more than a hundred dollars. This etrailer kit cost me less than $$.00 all told, part and shipping included. These people at etrailer are so very helpful and can save you so much money and frustration. You owe it to yourself to give them a try. Thanks etrailer. Awesome product and service. I will definitely use you again. In fact, I expect to order a frame mount hitch receiver from you later this spring. 334895



- 118315
by:

Great price, great shipping. Simple in stall. 332790



- 118315
by:
1990 GMC Odyssey

Quick delivery, good price, good product, good installation video--an all-around good experience. Installation on my 90 gmc shortbed took ten minutes, and I took my time. 331840



- 118315
by:
1997 Chevrolet C/K Series Pickup

Exactly what I ordered. A no brainer. Literally a plug and go deal here. Absolutly no splicing or destroying your factory wire harness. The other trailer light connector styles require you to cut and splice in a wire allowing for moisture to cause corrosion. A little electirical grease before connecting it and my connections have been corrosion free for over a year now. Very satisfied. Have recomended time and time again. I pull trailers every day and this product has held up. Plan on purchasing 4 more in the future for my other trucks. 329661



- 118315
by:

It fit very well - better than I expected. I am well pleased. 320466



- 118315
by:

Easy to install, fits as advertised. 317405



- 118315
by:

Great service and great product. Ellen is a great asset to E-Trailer. I would shop here again. 307401



- 118315
by:
1997 GMC C/K Series Pickup

The led trailer lights and wiring harness all worked well! Cured my trailer light Problem totally!! 305401



- 118315
by:
1988 Chevrolet C/K Series Pickup

Plugged right in. Easy install ! 286875



- 118315
by:

Product was exactly as described and as shown on website. Worked perfectly for my needs. Treated wonderfully by staff, Ashley. Highly recommend this company. 280902


Comments

I actually used the harness to repair my factory truck wiring since the previous owners cut and spliced so many times that the harness was no longer good, The connectors were identical to the GM connectors so it was a simple cut, solder and seal procedure. Thanks again for a great product and excellant customer service.

Mike S - 08/09/2017

27011

- 118315
by:
Chevrolet Silverado

Great product!!! Easy to wire on my 24 year old Silverado with only 62,000 miles. This is the place to go for great service and fast shipping. Thanks guys! 268145



- 118315
by:

Excellent. Product was correct and came quicker than I expected. 246865



- 118315
by:

Great product. I tried to get the part from my local auto parts supply store, but either they kept me on hold or said they would call me back but never did. I decided to try online. Everything went smooth from start to finish. I would highly recommend using this company. John 246381



- 118315
by:
1997 GMC C/K Series Pickup

Still works great. 243886



- 118315
by:
1998 Chevrolet C/K Series Pickup

Installation on my Chevy C1500 was a breeze. Simple plug and play, secured w/ zip tie then attached ground to body, adding a dab of electrical grease (wire to body). I purchased the flat 4 mounting bracket, drilled two holes , and mounted it on the bottom of bumper near the ball. A dab of electrical grease on the flat 4 dust cap and it's good to go. I must of looked at it four times afterwards, thinking, man that looks good. Just buy it, you've already been thinking about it. 241705



- 118315
by:
1995 Chevrolet C/K Series Pickup

Great product. Simple install, works as it should. 239645



- 118315
by:

prompt delivery,competive pricing,product as advertised,good installation info 237217


Comments

been in service a year ,all working as advertised Thanks

william f - 03/13/2017

22814

- 118315
by:
1998 Chevrolet C/K Series Pickup

This is a plug and play 15 min to install shipping was fast will buy again Thanks 235619



- 118315
by:
1997 Chevrolet C/K Series Pickup

This was a very simple plugin installation. I did have to drill a hole for a self tapping screw for the ground wire (the drill size was a little larger than what the instructions called for). Just make sure you put it where the spare tire will not come into contact with it. (I had to do it twice). I'm very happy with my new hitch and wire harness. Shipping was fast. I think I ordered it Friday morning and received it Monday or Tuesday. 234367


Comments

So far so good. No problems at all.

John W - 12/26/2016

22109

- 118315
by:

Recently rewired the tail lights on my truck. This was MUCH easier than "cutting and splicing" again. Plug 'n play 'n go! Thanks guys and gals at Etrailer.com. 233107



- 118315
by:
1994 Chevrolet C/K Series Pickup

This was what i needed to wire my truck to my trailer worked perfect. The shipping was very fast great service, Thanks 232862



- 118315
by:
1994 Chevrolet C/K Series Pickup

This was what i needed to wire my truck to my trailer worked perfect. The shipping was very fast great service, Thanks 232861



- 118315
by:
1996 Chevrolet C/K Series Pickup

Great shopping experience, fast delivery and no splicing my wiring harness I used this to make my 60" led lights on the truck bumper work... HAPPY HAPPY HAPPY 231813


Comments

Still working great with no problems still satisfied

Tony H - 11/10/2016

21813

- 118315
by:

I was a little concerned when I opened the package and the product I received did not look exactly like what was pictured in the catalog, but it fit perfectly. I've had an on-again-off-again problem with my "professionally" wired trailer lights from day one. The eTrailer wiring T eliminated a rat's nest of wires, fixed my problem, I did it myself, and I saved big bucks! 231195



- 118315
by:
2000 Chevrolet C/K Series Pickup

Good fit. 229551



- 118315
by:
1998 GMC C/K Series Pickup

Exact fit for my 1998 GMC truck. Installation was easy and straight forward as advertised. Will be returning to etrailer for all my future truck and trailer needs. 228936


Comments

The item that I purchased a year ago is as great today as the day I installed it. This is a great product.

Dick D - 10/01/2016

21369

- 118315
by:

Fast, quick, and quality product! 226868



- 118315
by:
1993 Chevrolet C/K Series Pickup

Stupid me!!! I have been wiring trailers on my own for years... Finding the trailer wiring set that simply plugs in on etrailer.com saved me time, frustration and laying in the dirt! On top of that, it was delivered quick and works great... Thanks etrailer Larry Bowers / Utah 225461


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Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?


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  • Directions for Installing a Brake Controller on a 1989 Chevrolet Silverado Without Towing Package
  • Installing a brake controller on your 1989 Chevy Silverado pickup is pretty straight forward. To start, you will need all of the parts for the complete installation of a trailer connector and the brake controller. The parts needed are a 4-Way trailer connector, item # 118001, or # 118315, a Brake Controller 7 & 4 Way Installation Kit, item # ETBC7, and a brake controller of your choice. Brake controllers are not vehicle specific but there are some things to keep in mind. A proportional...
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  • How To Install The Hopkins Brake Controller, # HM47294, On A 1998 Chevy 2500 Truck
  • To install the Hopkins Brake Controller, # HM47294, on your 1998 Chevrolet 2500 truck you will need the Tow Ready T-One Wiring Harness, # 118315, and the Brake Controller 7 & 4 Way Installation Kit, # ETBC7. Your 1998 Chevrolet truck does not have the wiring run for a brake controller, so you will need to hardwire the brake controller to your vehicle with the # ETBC7 kit. You will first want to install the Tow Ready T-One Wiring Harness, # 118315, on your vehicle. This harness will...
    view full answer...

  • Trailer Wiring Does Not Work on a 1999 Chevy Silverado or C/K Series Pickup
  • Does the converter you are using by any chance require a direct connection to the vehicle battery to actually power the trailer lights? Some converters are powered and they get the signals from the tail light wiring but the power comes from the vehicle battery. It could also be a bad converter box. Use your test light to test the wires going into the converter box to make sure they are correct. If they are not correct that indicates a problem with the truck wiring. If they are correct...
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  • Electric Brake Controller Installation Instructions for a 1991 GMC C/K Series Pickup
  • Brake controller wiring Colors are as follows. White = ground, negative battery terminal Blue = trailer brake feed, output to 7-Way trailer connector Red = stop light, 12 volts when brake pedal is pressed Black = 12 volt power, constant If the red wire going to the Draw-Tite Brake Controller, # 5504, has constant 12 volt power it is attached to the wrong circuit. You will need to attach the red wire from the brake controller to the brake pedal switch wire that is hot only when...
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  • Fit of B & W Heavy Duty Class V Hitch Part # BWHDRH25124 on 1998 GMC C/K Series Truck
  • The B & W Heavy Duty Trailer Hitch Receiver you referred to, part # BWHDRH25124 is indeed a fit for your 1998 GMC 2500 C/K series pickup. It is compatible with the factory step bumper. I have confirmed this for you with the nice folks at B & W. If you don't have a 4-pole trailer wiring harness, you can add one using part # 118315. You might also need a ball mount like part # BWBMHD30010 and a trailer ball. Use # 19260 for a 1-7/8 inch ball, # 63845 for a 2 inch or # 63847 for a 2-5/16...
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  • Recommended 7-Way Trailer Wiring Harness for 1995 Chevy C3500 with 5.7L
  • For your 1995 Chevy C3500, I recommend your start with the Tekonsha Prodigy P3 brake controller # 90195. This proportional controller will apply your trailer brakes at the same time and with the same intensity as you hit the brake pedal in your truck. It has easy to use presets and has an LCD screen to avoid code deciphering of most other brake controllers. It is completely transferable to another vehicle if you decide to move trucks at some point. If you want a more basic controller,...
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  • Availability of Brake Controller Adapter for 1997 Chevy Silverado
  • GM did not start equipping their trucks with the under-dash brake controller connector until the 1999 model year. That being said, you can still wire your pickup for a brake controller. If your pickup has no trailer connector at the rear bumper, you can get a T-one wiring harness, part 118315. That will give you the 4-pole plug. You will also need the ETBC7, which is a kit that gives you 7-pole plug and has wiring which is run to the front of your vehicle for the brake controller. We...
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  • Wiring to Add 5-Way Harness on 1992 Chevy Silverado to Connect to Boat Trailer
  • To add a wiring harness to your 1992 Chevy Silverado for your boat trailer you need to first add a 4-flat, the T-One Vehicle Wiring Harness # 118315; I've attached a link showing this harness being installed on a similar truck for you to check out. From there you need an adapter, the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 to give you a 5-flat on your Silverado.
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  • Adding a 7-Way Trailer Connector to a 1997 Chevy C/K Series Pickup
  • It sounds like you need to add a 7-Way RV style trailer connector to your 1997 Chevy pickup. Since you already have a connector, you will just need to add a 4 and 7 Way Installation Kit, # ETBC7. Though I am not certain if you have a 5-Way flat connector or a 4-Way flat connector. If you have a 4-Way, it will plug into the back of the ETBC7. If you have a 5-Way, I recommend first installing a 4-Way using part # 118315, and plugging it into the back of the ETBC7. With the 4-Way plugged...
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Info for this part was:

Test Fit:
Joe V
Test Fit:
Nicholas E
Expert Research:
Michael L
Expert Research:
Michael H
Expert Research:
Jeffrey L
Video by:
Andrew K
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C
Updated by:
Isabelle B
Installed by:
Cole B
Video Edited:
Chris R

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