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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2009 Scion tC
Tekonsha

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

Part Number: 118304
In Stock
$45.43
Retail:$68.39
You Save: 34%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2009 Scion tC

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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. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118304 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 (378)
  • Q & A (0)
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Tekonsha Custom Fit Vehicle Wiring - 118304

  • 4 Flat
  • No Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Tekonsha
  • Plug and Lead
  • Converter
  • Hidden

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 behind tail lights
    • 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: 4.2 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 tail lights. You will have to remove the tail light assemblies to access this harness.


T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 4-way flat connector will be stowed in the jack storage compartment of your rear 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.



118304 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118304 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.9

378 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:

Good price. Fast shipment.



by:

Really easy to install and works great.



by:
2006 Toyota Sienna

was explain very well how to install



by:
2006 Toyota Sienna

Very easy to hook up to my 2006 Sienna.



by:

Very easy instulation.



by:

Worked like a charm



by:
2005 Toyota Sienna

very very simple install!



by:

Wiring harness was very easy to install!



by:

Awesome product. Very easy to install.



by:

Installed with ease.



by:

PERFECT !WORKED AND FIT PERFECTLY



by:
Toyota Sienna

Installed in 20 minutes. Excellent product and hassle free on my '08 Sienna.



by:

great productthis was so easy to install it only took me 30 minutes.



by:

Fast shipping. Easy install-great video support. Works perfectly.



by:
2006 Toyota Sienna

Fast delivery, easy install due to video info, plug and go. Great product.



by:
2006 Toyota Sienna

Fast shipping and a good product, great price.



by:
2005 Toyota Sienna

The wiring harness works perfectly and the training video was a huge help. Thank you!



by:

Nice wiring harness easy to install as shown in online video great product



by:

good product easy to install, this is a 5 stars will recomment to everyone. thanks



by:

Sooooo easy!The directions are a little fuzzy with lousy pictures, but in the end, this was a piece of cake to install....30 minutes for an automobile novice here.



by:

Very easy install! Youtube video was very helpful as well.



by:

The wiring harness was easy to install, even for me - a banker.



by:
2009 Toyota Sienna

Installation on my 2009 Toyota Sienna was quick and simple. The youtube video was especially helpful. Much better than reading printed directions.



by:

Online tutorial was perfect and made installation a no brainer. Great experience all around.



by:

Not only was your product easy to install, your online video instruction was great. I wired the vehicle in less than 15 minutes and everything works great.

Jeff


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378
Show More Reviews

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

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    Trailer wiring harness # 118648 fits the 2015 to 2017 Toyota Sienna but not your 2006 model. For your 2006 Toyota Sienna the comparable trailer wiring harness is # 118304. This is not a powered harness though so if you want one that does both fit your van and require a connection to the battery you can use Hopkins harness # HM11143485. Since the trailer you want to tow has electric brakes you will also need to install a 7-Way trailer connector, in addition to one of the 4-Ways listed above,...
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  • Switching An Electric Over Hydraulic Brake Set Up To Surge Brakes
    Hi Scott! You can do either! The brake controller option would be the way I would go though as you wouldn't have to bleed the brakes (which is a pain in the butt) and it can be used with other trailers that have electric or electric over hydraulic brakes (plus it works better than surge brakes). For that, you will only need a few things, but I wanted to ask a few things first. Are you sure it's a 6-pin plug? They aren't used very often, but will still work. I included a picture showing...
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    The Curt Class III 2-Inch Hitch, part # C13105, you have referenced, will fit your 2008 Toyota Sienna Limited. If you are meaning an installation DVD on the hitch, I do not offer any installation DVDs. I am including a link to the installation instructions and a link to an installation video of the Curt hitch being installed on a 2006 Sienna. The vehicle is a different year, but it is the same design second generation Sienna as you 2008 model. If you plan on doing some towing, I recommend...
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  • Will Curt Trailer Hitch # C13105 Fit a 2010 Toyota Sienna with All Wheel Drive
    Yes, the Curt trailer hitch, # C13105, will fit all models of the 2010 Toyota Sienna including all wheel drive models. I have included a link to a video that shows a typical installation for you. If you plan on doing some towing, I recommend the etrailer ball mount kit # EBMK4. It comes with a ball mount, interchangeable ball set, hitch pin and clip, and a carrying bag. For trailer wiring use # 118304. I have included links to the instructions for the wiring as well.
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  • Difference between Tekonsha T-One and Curt T-Connector Wiring Harness for 2007 Toyota Sienna
    The Tekonsha T-One # 118304 and Curt T-Connector # C55580 Vehicle Wiring Harnesses are very similar. These are both custom fit wiring harnesses that include a tail light converter, which is required for your 2007 Toyota Sienna because the brake and turn signal wires on this vehicle are separate. The converter is needed to combine the two functions to be compatible with the trailer wiring system. The Curt # C55580 does have higher maximum amperage for the stop/turn and tail lights and is...
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  • Brake Controller and Install Harness Wiring for 2008 Toyota Sienna
    For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes. This will be the last brake controller you buy. It can easily be transferred to future vehicles as well. You will need to start with a 4-way (if...
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  • 2015 Toyota Sienna Se Trailer Hitch Recommendation for Ground Clearance
    The rear of your 2015 Toyota Sienna does sit pretty low. For a trailer hitch for your vehicle the best option is going to be the smaller 1-1/4 inch trailer hitch size like the part # 36513 as it will offer slightly better ground clearance than a 2 inch hitch. For a ball mount you would need the part # 36051, 2 inch hitch ball # 19258 or 1-7/8 inch ball # 19256. For trailer wiring you would then want the # 118498.
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  • Recommended Hitch and Wiring for 2006 Toyota Sienna Towing Trailer With Golf Cart
    In order to transport your golf cart with a trailer you will need a trailer hitch, wiring, and a ball mount. I recommend the following for your 2006 Toyota Sienna: -etrailer Trailer Hitch Receiver # e98837 -T-One Vehicle Wiring Harness # 118304 -etrailer Ball Mount Kit for 2" Hitches # 989900 The etrailer hitch is a Class III hitch with a 2" receiver. It has a maximum gross trailer weight of 3,500 lbs and a bolt-on installation. It also features a matte black powder coat finish and...
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  • How to Wire a Brake Controller on a Toyota Sienna 2005 XLE
    You will need a Wiring Harness, item # 118304, to start with. Once you have this wiring harness installed and working properly you will need to do some additional wiring to complete a 7-Way connection at the rear of the vehicle. You will need the Brake Controller 7 & 4 Way Installation Kit, item # ETBC7. This kit comes with all of the wiring, brackets, circuit breakers and connectors needed to complete the installation of a brake controller and a 7-Way connector. To complete the wiring...
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  • Troubleshooting 2008 Toyota Sienna With Trailer Running Lights Not Working
    There is not a separate fuse in the wiring harness itself. Normally for the functions like stop and turn to work but the running lights not to work is a bad ground wire connection on the vehicle or the trailer. Running lights stay on, so they draw more current than the other functions. Check the wiring harnes ground wire (normally white) where it attaches to the vehicle and make sure you have a clean metal to metal connection. Also check the trailer ground for the same. Any corrosion,...
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  • Turn Signal on 2004 Toyota Sienna Hyperflashes with Brake Pedal with Wiring Harness 118304 Installed
    First let's make sure that everything is hooked up properly. The red and green wires on harness # 118304 will go to the passenger side and the yellow and brown go to the driver side. If those were swapped it could cause some issues. Also make sure that the white ground wire is attached to a bare metal surface. Moving the ground could help. Ground problems can cause all sorts of weird things to happen. To determine if the converter box is bad, you will need a circuit tester, # PTW2993,...
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    The Curt Trailer Hitch Receiver # C13105 is a great choice. We also include a great installation video on the product page with your 2009 Toyota Sienna. I recommend a Brush # 814092 to clean out those threads on the mounting holes as they will be filled with dirt and road grime. This will help when installing your hardware to ensure you don't cross thread your bolts. For the wiring I like the Tekonsha Vehicle Wiring Harness # 118304 best for your Sienna. It is plug and play with your factory...
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    For a hitch for your 2004 Toyota Sienna that will allow you to do some towing I would recommend the Hidden Hitch part # 87415. This is a Class III hitch with plenty of capacity that would work great for you. I attached an install video for you to check out as well. This hitch has the capacity for towing your small trailer and lawn mower, but you will also want to check the owners manual of your vehicle to determine the towing capacities of it as well and be sure to go with the lowest rated...
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    The best fitting and best priced hitch we offer for your 2007 Toyota Sienna is the Draw Tite part # 75237 which is a confirmed fit. This hitch has more than enough capacity for a jet ski trailer as well. I attached an install video for that for you to check out as well. For trailer wiring you then would want the part # 118304 which is confirmed as a fit and is the most reliable option we have. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900....
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  • Trailer Lights Not Working with 2008 Toyota Sienna with Never Used Tow Package Wiring
    Since you have not used the trailer wiring harness on your 2008 Toyota Sienna until recently then there are a couple of likely things happening. First, the pins on the vehicle side connector could have corrosion in them even if the harness was stowed away the whole time. that can happen to untreated metal. Using a wire brush or screwdriver to clean out the metal contacts will help. The other thing to look at is the ground connection. This is usually a white wire. It needs to be connected...
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  • Parts Needed to Add a 7-Way Trailer Connector to a 2006 Toyota Sienna
    For the 2006 Toyota Sienna you would need to use the 4 and 7 way installation kit # ETBC7. There is no powered plug in connector available for the Sienna just because the vehicle is not set up for it. If you already have a 4-Way wiring harness on the van then the ETBC7 will be all you need. But if the van currently has no wiring you will first need to install a 4-Way using # 118304. I have linked instructions and a video for this harness. If you wanted a powered 4-Way converter instead...
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  • Best Trailer Hitch for 2007 Toyota Sienna
    To tow a trailer with your 2007 Toyota Sienna, the best hitch is going to be the Class III Draw-Tite # 75237 over the Class III option from Curt because the Draw-Tite is rated for a higher capacity and is also the more economical choice. This hitch has a 2" receiver and 4,500 lb towing capacity, which is 1,000 lbs more than the capacity of your Sienna though please be sure to adhere to the 3,500 lb capacity of your vehicle. You are also gonig to need to add a 4-way connector # 118304 to...
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  • Trailer Wiring Harness for a 2006 Toyota Sienna
    For your 2006 Toyota Sienna there is a plug and play wiring harness available, # 118304. This harness will fit, and just plugs in line with the vehicle tail light wiring. There is no splicing into the vehicle tail light wiring required.
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  • Wiring Harness, Sensor, and Electrical Problems After Installing a Spliced Wire Harness on a Toyota
    The item you selected, T-One Vehicle Wiring Harness, part # 118304, will work on your Toyota. There is another harness that will protect the vehicles circuits, the Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness, part # C59496. This kit only draws .5 milliamps from the vehicle lighting system and uses a circuit protected modulite that is a safe guard from short circuits or wiring shorts. Part # C59496 draws power directly from the vehicle battery, and only draws...
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  • What Trailer Hitch Is Recommended For Towing A Boat With A 2005 Toyota Sienna
    I will be glad to help you with your hitch selection. The Draw-Tite Class III 2 Inch Hitch # 75237 would be an excellent choice for the towing situations you have described. With the 2 inch receiver you will have a wider selection of accessories available that you may need in the future such as bike racks and cargo carriers. It has a towing weight capacity of 3,500 lbs. and a tongue weight capacity of 350 lbs. At this time, there is not a Class II receiver with the 1-1/4 inch hitch opening...
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    Image 1 for
  • Trailer Wiring Harness for a 2015 Toyota Sienna
    We do have some wiring harness options that will fit your 2015 Toyota Sienna. Tow Ready harness # 118648 and Curt harness # C56261 will fit your Sienna as long as it is not an SE model. Both harnesses do require a connection to the vehicle battery. I have linked a help article with tips on routing the power wire.
    view full answer...
  • Trailer Wiring Harness for a 2009 Toyota Sienna
    Neither of the trailer wiring harnesses for the 2009 Toyota Sienna require a direct connection to the vehicle battery. Both Tow Ready harness # 118304 and Curt harness # C55580 plug in line with the vehicle tail light wiring and the only other connection that needs to be made is the ground wire. Some vehicles require a powered converter if there isn't a plug and play type of T-connector available or if the wiring is suspected to not be able to handle the power draw without a powered converter....
    view full answer...
  • Recommended Brake Controller For 2004 Toyota Sienna
    Brake controllers are not vehicle specific, so it is a matter of personal preference on which controller you choose for your 2004 Toyota Sienna. I recommend using a proportional brake controller. A proportional controller will activate the trailer brakes in proportion to your vehicle's braking action. The Tekonsha Primus, part # TK90160 is an excellent controller at a great price that would be an excellent choice for you unless the trailer you're pulling has an electric over hydraulic...
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