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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
1993 Jeep Cherokee
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CURT

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

Part Number: C55418
In Stock
$49.84
Retail:$72.95
You Save: 32%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

1993 Jeep Cherokee

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In Use/Installed

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C55418 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (88)
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CURT Custom Fit Vehicle Wiring - C55418

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-pole flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connector plugs inline with tail light wiring—no splicing needed.
  • Reliable Signal Match: Built-in converter syncs vehicle and trailer turn, brake, and tail lights.
  • Clean Interior Routing: Harness runs under rear threshold using factory panels for a tidy setup.
  • Solid Ground Connection: Dedicated ground wire ensures consistent light power and avoids faults.

Features to know about

Installs Fast Without Cutting Wires: Plug-In T-Connector

Wiring for trailer lights doesn’t need to be a hassle. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into the factory tail light connectors behind the trim panels. No wire cutting or splicing—just plug it in and snap the panels back in place. It’s a simple plug-and-play setup that gets you ready to tow in no time.

Clean Setup Behind the Trim: Hidden Plug-In Design

The harness stays tucked behind the rear threshold and side trim, keeping everything neat and out of sight. The converter box mounts inside the cargo area where it’s protected from road debris and moisture. When you’re done, only the 4-flat connector is visible, ready to hook up your trailer lights when needed.

Reliable Lighting Connection Every Time: Solid Ground and Converter Box

A strong ground connection keeps voltage steady so your trailer lights work consistently. If you ever see low voltage at the plug, checking that ground connection usually does the trick. The built-in converter box ensures the right signal output for running, brake, and turn lights through the 4-way flat connector.

Ready for Standard Trailers: 4-Flat Output for Running, Turn, and Brake Lights

The 4-flat connector gives you everything you need for basic trailer lighting—running lights, left and right turn signals, and brake lights. It’s the same connection used on most small utility trailers, so once it’s installed you’re ready for towing right away.

Specs

  • Image: Comparison chart of Curt T-Connector vehicle wiring harnesses showing different connector types, wire configurations, and converter boxes labeled with reference callouts for model identification.

55418 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Hopkins 43475

Installation Details C55418 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.9

88 reviews
5 Stars
(82)
4 Stars
(4)
3 Stars
(1)
2 Stars
(1)
1 Star
(0)
Review Sort Icon
by:
1998 Toyota Sienna
Very easy to install and work like it should from the start
by:
1999 Toyota Sienna
Easy to install works great
by:
2003 Toyota Sienna
The wiring harness fit perfectly. Instructions were clear for the installation. Thanks.
by:
1998 Toyota Sienna
Incredibly simple! Took me longer to move stored items out of the way than it did to hook up the wiring! No soldering, no sketchy connectors, everything plugs into the factory wiring harness. I drilled 1 hole for the ground wire. Done. Wonderful product!!
by:
2010 Toyota Sienna
Installed and tested the trailer wiring in my 2002 sienna this evening. Works perfectly. It took an hour to do, and I am a novice amateur with the confidence to try.
Tools required: a couple screwdrivers, a 10 mm ratcheting socket wrench. Its a good thing I have lean narrow hands to fit in the tight spaces. Even if I wanted to try splicing, and even if I had a way to get toyota wiring to match u.s. trailer lighting, I would have cursed myself silly for hours trying to work behind the panels of my van.
A tip for future users: don't try to drill in the ground. I lost the screw and a few more before discovering that the jack bracket will bolt the ground wire to the body of the van spectacularly.
Merinda profile picture

Merinda

2/11/2015

I have had this installed for a year, now. It works great and I havent had to give it a second thought. The wire is nice and long, so it will reach out to the connector thats mounted too far back on my 14-foot trailer. My 4x8 trailer is more common for me to use, and there, too, I have no problem at all. It just works, plain and simple.

by:
worked like a charm, excellent product
by:
2002 Toyota Sienna
Plug and play..works great ..highly recommend it..
by:
Super easy to install this and the wire length is great. I finally have power to my hitch cargo box and I couldn’t be more pleased with this kit. My one recommendation is that extra self tapping screws be included on the kit as I ended up losing the original one inside the car while trying to drill for the ground wire. Otherwise, install was super fast.
by:
2002 Toyota Sienna
Easy installation in our 2002 Sienna. We put the control module in the jack storage recess, and picked-up a ground from one of the bracket mounting screws in that same location - no drilling required. Works well, and is about as easy to install as it gets.
by:
2001 Toyota Sienna
The hitch harness proved to be very easy to install by following the instructions and video and product-wise was a good investment. Over all, the transaction and the installation was a breeze. A "well done" shout-out to the etrailer crew!
by:
Ford Flex
Thank goodness for the video that showed how to install the wiring harness. Unlike the last wiring harness I installed, there were no wires to be cut, matched up, and crimped. The existing wire harnesses were simple unsnapped and the new one snapped in between them - and it was instantly and easily attached. Did this on both sides, and attached the ground wire to the body with the screw provided. I must admit that the plastic panels did not flex as easily as in the video in order to get to the hidden wires, but it didn't impede the progress that much. I reassembled everything, plugged it into my trailer, and wah-lah! Let there be light!!!
by:
2000 Toyota Sienna
Installation was simple and went exactly as shown in the installation instructions. I use my trailer frequently and the lights work everytime. I would strongly recommend this product for ease and reliability.
by:
2002 Toyota Sienna
Very easy to install after watching the video
by:
I very seldom give 5 star reviews, but etrailer.com is like seriously hitting the EASY button!! From the initial call to order the harness and the information I needed for my receiver hitch bolts, they were fantastic! When I need anything for towing or camping in my rig,etrailer.com is my new go-to company. You won't be disappointed I assure you.
by:
2002 Toyota Sienna
1. Put some 1/4” split wrap around the cross-sill cable and harness so that you don't snag the wires on the sharp edges inside the vehicle going up to the lights or across the sill.
2. Be careful pulling off the sill plate -- you'll probably need to replace some of the fasteners.

All in all, very nice!
by:
The Curt T-Connector was delivered promptly after I ordered it. etrailer provided me with a great installation video. It was a fairly simple install.

I'm glad I chose to order this from etrailer.
by:
2001 Toyota Sienna
Easy installation on a 2001 Sienna van. Wiring harness presented no problems once the interior panels are loosened up. Biggest problem is the age of the body panel clips and a couple of them broke before releasing. Others went well. No real damage, just not quite as tight as before, but not visible.
Smaller hands would have been better! Great product, saved us hundreds of dollars with self installation.
by:
2000 Toyota Sienna
This wiring harness arrived as advertised. It only took me 30 minutes to connect to my vehicle and that's only because I had trouble separating one of the panels on my vehicle and that had nothing to do with the harness. It was really simple to install and it worked great. Etrailer comes through again!!
by:
2000 Toyota Sienna
It was easy to install. It has worked great. i really liked that it gave me plenty of wire .I needed more because my one trailer needs to be re-wired and the wire doesn't stick out very far.
by:
1999 Toyota Sienna
Fast service and quality product at a fair price.
by:
I was about to wire up my van the old fashioned way which would have taken hours and then I found your harness online by accident. It was amazing. I had it hooked up in about 45 minutes and it works great!!
by:
Phenomenal service. I will continue buying from etrailer.com. Their service representatives are fantastic; giving me the impression that this is a family-owned business. Installation of the trailer wiring for my vehicle was a cinch, thanks to thier online installation video. You guys saved me about $100 at least. Keep up the great work.
by:
Once I figured out where the connectors behind the van's panels were it was simply plug and play. I connected the ground wire to an existing screw making that simple too.
by:
2002 Toyota Sienna
Great product. Plenty of wire to make a professional looking installation.
Clear and adequate instructions
All terminals and plugs fit as they should and clicked into place as they should.
by:
2002 Toyota Sienna
Just follow the directions and no need to probe wires with a test light or chance to mess your vehicle up! I did purchase a wire loom from my local Napa auto parts store and ran electrical tape to keep the wire loom intact and protect my vehicle from electrical shorts down the road.
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Towing Capacity and Parts Needed to Tow with a 2002 Toyota Sienna
    The first place to look in regards to weight ratings for any vehicle is the owner's manual. I took a look at the online version of the owner's manual for your 2002 Toyota Sienna and it states on page 244 that if you have the factory towing package your max trailer weight capacity is 3,500 lbs. Without the factory towing package your max trailer weight rating is reduced to 2,000 lbs so unfortunately you will need to look for a lighter trailer. From what I could tell it looks like the only...
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  • Trailer Hitch Recommendation for a 2000 Toyota Sienna for Camper Towing
    Both the Draw Tite Hitch part # 75120 and the Curt Hitch part # C13511 would work well on your 2000 Toyota Sienna. The only reason I would go for the Curt is because it costs less and has more positive reviews than the Draw Tite currently. This hitch has a 350 lb tongue weight capacity so it would work well with your cargo carriers. 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...
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  • How to Install Curt T-Connector Vehicle Wiring Harness# C55418 on 2002 Toyota Sienna
    We sure do! I've linked you to the installation instructions as well as to an install video. In a nutshell, you'll remove the rear threshold and pull back the trim panels on either side of the cargo area so you can access the back side of the taillight assemblies. You'll unplug the vehicle wiring harness from the taillight assembly, plugging the half of the harness with the YELLOW wire inline between the taillight assembly and the vehicle wiring harness on the driver's side. Route the...
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  • Troubleshooting Curt Trailer Wiring Harness No Driver Side Lighting Functions Active
    Hey David, it could very well be a bad module and needs to be replaced but it's also possible that one of the connectors just isn't seating properly as we see that pretty often. So try unplugging the connectors and plugging them back in to see if that fixes it.
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  • Parts Needed to Tow Trailer with 2000 Toyota Sienna V6
    An official tow package is something that can only be added on by the manufacturer of a vehicle. It can include a trailer hitch, wiring, possibly a transmission cooler, better brakes, lower gearing etc. For your 2000 Toyota Sienna we can help with some of that, but it wouldn't be an official Toyota towing package. For a trailer hitch you'd then want the Curt part # C13511 which is confirmed as a fit and would a great option with plenty of towing capacity. For trailer wiring you'd then...
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  • Parts Needed to Tow Small 5x8 Trailer with 2003 Toyota Sienna CE
    Para remolcar un trailer cerrado con tu Toyota Sienna CE 2003 vas a necesitar el remolque, los cables para las luces, el enganche, la bola de enganche y un pin y un clip. El mejor remolque para tu Sienna es el Curt # C13511 porque tiene el recibidor de 2 pulgadas y la instalacion es sumamente facil en comparacion a otros remolques disponibles para tu van ya que no requiere taladrar agujeros. Para el cableado, te recomiendo el # C55418 y para completar, el enganche # 2753 que incluye el...
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    Image 1 for
  • Trailer Turn Signals are Only Working Intermittently on Trailer Towed by 2001 Toyota Sienna
    Ground problems can cause all sorts of weird things to happen. Most likely that is the problem. Since you tested the 4-Way on the van and it is working that narrows down the issue to the trailer. First make sure that the trailer connector is free of dirt and corrosion. This can cause a bad ground and if you are moving things around and it suddenly starts to work it could be because at a slightly different angle there is a better ground connection. OR there is a loose or broken connection...
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  • Recommended Trailer Hitch Receiver For 2002 Toyota Sienna
    I have another option for you, but the Curt Trailer Hitch Receiver W/ Euro Drawbar C114122 is not confirmed to fit your 2002 Toyota Sienna. It is designed for select 2015-2021 Volkswagen Golfs. Instead I recommend the Curt Trailer Hitch Receiver # C13511 which is a confirmed fit for your Sienna. This hitch has a 350lb tongue weight rating and 3500lb trailer weight rating making it a perfect choice for carrying a bike rack, cargo carrier, or ball mount for towing a trailer. If you are...
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  • Trailer Wiring Harness for a 2001 Toyota Sienna
    There are several different wiring harness that will fit your 2001 Toyota Sienna and I have included a link to them for you. However, the harness that you referenced, # C55384, will not fit your Sienna. For a harness that plugs in line with the vehicle tail light wiring you can use # C55418. I have included a link to the installation instructions for you to view.
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  • Parts Needed to Tow Trailer with 2002 Toyota Sienna
    To tow a trailer with your 2002 Toyota Sienna requires first a trailer hitch like the part # 75120. Which is a confirmed fit. Then for trailer wiring you would want the part # C55418 which is also a confirmed fit. Since 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 and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with...
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  • Which Trailer Hitch and Wiring Harness for a 2002 Toyota Sienna
    The Curt # C13511 you were looking at is a great choice that will give you a 2 inch receiver that's ideal for towing or carrying a hitch mounted accessory. I really like Curt hitches because of the heavier powder coating they apply, which will stand up a bit better to nicks and scratches; this will be important in prolonging the life of the hitch and keeping it corrosion free. For the wiring harness I recommend using the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer...
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  • Trailer Wiring Harness and Hitch that Fits 1998 Toyota Sienna
    If the trailer wiring harness you bought for the Dodge Caravan was a universal style like the # 119250KIT it would work with the 1998 Toyota Sienna but if it was a custom fit option you'd need to replace it as well like with the Curt # C55418 which fits the Sienna and would work great with the Curt hitch # C13511.
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  • 2000 Toyota Sienna With Low Voltage At 4 Pole Plug
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C55418 on your 2000 Toyota Sienna with low voltage at the plug is most likely a ground issue. Follow the ground wire from the converter box to where it is grounded to the vehicle. If the self tapper was used, make sure the self tapper did not back out a little. Sometimes if the metal is not thick, the self tapper may not get tight enough and the ring terminal will be able to move. If this is the case re-locate...
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  • No-Drill Trailer Hitch and Wiring for a 1998 Toyota Sienna
    For a 2 inch, Class III trailer hitch for your 1998 Toyota Sienna you can use # C13511. There is no drilling required for installation. I have linked the instructions and a video showing installation for you. If you plan on doing some towing I recommend etrailer ball mount kit # EBMK4. It comes with a ball mount with a 2-3/4 inch rise or 4 inch drop, interchangeable ball set, hitch pin with clip, and a storage bag. If the ball mount kit does not have the right rise or drop to tow the...
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  • How to Remove Rear Threshold to Install Trailer Wiring on a 1999 Toyota Sienna
    To install the Curt Wiring Harness part # C55418 you will need to remove the rear tailgate threshold. Basically you will just pull straight up on it and it will come out. To see how a very similar wiring harness would install on a very similar Sienna as your 1999 model check out the video I attached. It shows how the threshold is removed as well as the rest of the install process.
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Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Andrew K
Video by:
Andrew K
Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Nicholas E
Test Fit:
Nicholas E
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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