Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2008 Ford F-150
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2008 Ford F-150
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Wiring up a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into existing vehicle connections. It’s a plug-in design, so there’s no guesswork, no wire tracing, and no splicing needed to get your trailer lights working.
This harness is built to handle the job with an amperage rating of 3 amps per side for stop and turn signals, plus 5 amps total for running lights. That’s enough power for most standard trailer lighting setups. The included converter helps protect your vehicle circuitry and keeps the signal lines working properly between the vehicle and trailer.
If your old wiring has shorted out or stopped working, this harness is a straightforward fix. The integrated converter box replaces damaged circuits and restores proper lighting function. Just unplug the old setup, plug this one in, and your trailer’s brake and turn signals will be back online.
The 4-pole flat connector gives you running, turn, and brake light functions right away, and it’s also ready to work with adapters if you need more capability down the line. You can easily pair it with a 7-way adapter when you’re ready to add a brake controller or maintain a trailer battery using a 12-volt circuit.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
This is a good product and a ingenious idea. I loathe the idea of cutting into a wire harness to install trailer wiring. This is plug and play. Id give it 5 stars if it had better instructions more specific to exact application. Still it was fairly easy and works great.
Bought a receiver and light harness for my 2005 Toyota Sienna Everything worked exactly as planned. Also the year before I bought a light harness for our Honda Odessey. Same results worked like a charm. I would recommend etrailer to anyone who is looking for parts and products for their hauling needs.
Installation was straight forward. The videos are great. However, I did have some issues with the performance. I do think it was possibly related to grounding issues. Ultimatley I did replace this wiring harness with one that has its own power source, and more substantial grounding wire.
I recieved the new curt hitch quickly and my plug in wiring harness wich is the way to go no splicing wires just plug it in . my installation was for a 2007 toyota sienna. The directions say to lower the exhaust you do not have to lower it. You can push it over to the side those rubber mounts flex enough to get the bolts in. If your van is not new the bolt holes will be rusty go to a hardware store buy a tap the correct size tap is. 12mm×1.25 run the tap in all the holes before installing the bolts if you do not do this it makes very hard to install the bolts this will save you time.use oil on your bolts or antisieze, this will help them thread into the holes easier.have a friend help it makes things easieasier.it took about an hour for my installation.
Installed quite easily using the etrailer video.
I stuck the controller as high up as I could in the jack area but goofed put the yellow wire up. That used extra 2” of yellow wire to left taillight which almost made it too short. Before sticking up the controller, make sure you’ve got enough yellow wire to conveniently plug/unplug left taillight, with at least 4” of yellow wire sticking out.
This was an easy installation. The video for it on etrailer.com was very helpful. If you choose to run the trailer connector out through the grommet to mount by the hitch, it'll be pretty close to the exhaust. In the end, I drilled a couple of small holes through the underside of the plastic part of the bumper to facilitate attaching the wires out of the way of the tailpipe.
Hitch went on like a charm and the lights harness was perfect. Good purchase and good results.
The product came on time as estimated. It fits my 2007 Toyota Sienna. The installation video was great help.
Tuan
10/8/2019
Still working
2004 Toyota Sienna. PERFECT FIT! So was the electrical harness! Amazing! A product that matches the claim. The whole shebang arrived in a couple of days in mint condition. Several notes on my installation. Use ramps to get a comfortable look at the bottom of the vehicle. Then, make sure you soak the frame threads with Liquid Wrench or equivalent for several hours before installation and have a small plumbing type wire brush to ream out the threads THOROUGHLY. My van is 10 yrs old and there was a lot of crud so I hit the threads several times over two days as I waited for some spare time to install. Despite the Liquid Wrench soaking I had to use a breaker bar to spin the bolt the first time and had to clean the gunk from the threads several times. PB Blaster might be a better solution. And hire a helper if you don't have a floor jack to hold up the hitch. The exhaust just pushes out of the way with a block of wood. Twist one of the bolts into each hole to really clean the threads before you even touch the hitch. Use the same one for each hole in case you damage it. After that it was simple. Then, instead of running the flat four harness out the rear hatch I ran it through a rubber grommet that lies in the bottom of the 3rd row seat stowage well. The flat wire will lie under the carpet, out of sight, and fits past the grommet without any cutting of the rubber and exits directly above the receiver. I just weatherized it with window caulk and then strapped the wire onto the metal with liquid nails. A couple of cable ties hold the flat wire onto the round bar. Nice look. Note to e-harness - include longer black cable ties for securing harness to receiver tube.
I put this on a 2004 Sienna. I got a 12m-1.25 tap from napa and cleaned all the threads under the car. The hitch receiver lined up on 4 of the 6 bolts, the front hole on each side did not line up. , after calling etrailer and them saying it needs to bend the arms on each side outward. As 3 of the 4 recent reviews of this hitch for the Sienna all said they needed to bend the arms outward, apparently they are coming out of the factory with the arms an inch and a half too close together. Once I bent mine out it went on in ten minutes. and works good. I chose this Draw Tite hitch over the Curt because of the higher weight rating, which exceeds vehicle tow rating. I also
ordered the quick fit wiring harness which installed easily.
I have a Curt trailer hitch on my 2004 Toyota Sienna, which I am extremely pleased with. I have been using the hitch exclusively for mounting a Yakima bike rack... until recently. I acquired a utility trailer and, in California, the trailer must have functioning lights.
I decided to go with a Curt wiring harness for 2 specific reasons: 1) Curt seems to have an excellent reputation (and as said earlier I am extremely pleased with my Curt trailer hitch) and 2) the harness used connectors to the vehicle wiring versus splicing into the vehicle wiring (which I did NOT want). I opted to purchase thru etrailer.com because of their reputation according to my Google searches.
As for the wiring harness, I am again extremely pleased... the product worked perfectly (should you expect anything less?). Installation time was about 1&1/2 hours... but I was very careful taking things apart, triple checked everything during installation, taped the wiring in place where I felt appropriate, and carefully reassembled things. If you did these for a living or are far less picky than me, I can see maybe 30-ish minutes. As for the Curt website claim of 10 minutes installation time... hmmm.
The only minor disappointment was that every(?) visual of this harness that I saw on the web showed a wiring diagram on the control module. Even the instructions received with the harness included a picture with a wiring diagram on the module. Mine had none. A small issue I know, and its not really needed. But... I prefer to receive what I'm being shown I will receive.
Lastly, I must make a comment about the great service I received from etrailer.com... and particularly from Cathy H. When I placed the order I neglected to select expedited delivery... I wanted to be able to use the trailer ready that coming weekend. I called etrailer.com maybe 5 minutes after I hit submit and explained the situation. Cathy was extremely gracious, understood my predicament, cancelled the order I placed and submitted a new order on my behalf. Because of this service I received the order in time to install the harness and thus use the trailer on Saturday. Thank your etrailer.com and THANK YOU Cathy... for your awesome Customer support and service.
Great trailer, especially for a family with a minivan. Tows wonderfully, barely notice with our 200000+ Sienna. Tracks perfectly as well. Got the removable tongue which helps immensely with storage in the garage. Fairly simple to put together, just need a good set of wrenches and/or socket set. Only problem has been with wiring. Am blowing out the taillight fuse. Will try to rewire, probably insufficient grounding. Just remove the taillight fuse when towing and tow in daylight.
This hitch fit perfectly. While you do not have to lift the back end of the vehicle, lifting it 12-18" off the ground makes installation that much more simple. It is key to clean out the mounting holes in the vehicle frame, the cleaner the holes the easier the installation.
Tim F.
8/16/2020
Great, no issues as all.
I've used eTrailer for my trailer wiring and vehicle hitch needs for several years. I've never had any problems with the items I've purchased.
Dane G.
2/20/2018
We are happy with our hitch and trailer wiring. Thank you for the follow up.
Easy to follow instructions. Easy installation. No splicing. Plenty of wire to reach both sides
The Curt T-Connector was very simple to install. It does just what I need. I didn't need to do any drilling as I ran the wires from the passenger side and keep them stowed in behind the jack compartment door and just run them out through the door and then the lift gate for use. Great product.
Steve D.
8/3/2015
It is still working great. I would buy this product again.
Installation was easy, quality was excellent. In order to pass the trailer connector through to the outside of the van I made a cut one of the rubber body plugs and passed the connector through that.
Dave S.
8/23/2018
Thanks for the email. Both the hitch and wiring are performing great, Im totally satisfied with both.
easy installation, and worked without splicing wires or altering original harnesses.
Shipping was fast and it worked as described in your videos. Installed in about an hour, but could do it much faster now that I have done it once. Only problem encountered was the result of not following instructions.
I recommend etrailer and would use them again.
Liam C.
6/29/2019
Works when I need it. Haven’t used it much. Really liked that no cutting and splicing was needed.
Received the wiring harness on time and it is exactly as described.
The instructions were easy to follow and made the installation a snap. The fact that all the wires are long enough to hide the converter and the 4 prong plug in the jack compartment makes this a very clean install. This is a great product at a reasonable price, and I would recommend it to anyone.
Walt C.
1/6/2016
Works great! No problems at all. Thanks,
Arrived on time, easy installation fully functional.
I recieved the new curt hitch quickly and my plug in wiring harness wich is the way to go no splicing wires just plug it in . my installation was for a 2007 toyota sienna. The directions say to lower the exhaust you do not have to lower it. You can push it over to the side those rubber mounts flex enough to get the bolts in. If your van is not new the bolt holes will be rusty go to a hardware store buy a tap the correct size tap is. 12mm×1.25 run the tap in all the holes before installing the bolts if you do not do this it makes very hard to install the bolts this will save you time.use oil on your bolts or antisieze, this will help them thread into the holes easier.have a friend help it makes things easieasier.it took about an hour for my installation.
Brent
4/29/2014
I installed the wiring harness for my 07 toyota sienna its been great . The curt hitch I bought has been great I use my sienna like a truck .
Very simple installation and the video made it even easier with some good pointers.
Especially nice that it is truly just unplug factory connectors and plug in the appropriate wiring harness connectors.
If you don't have an electrical tester or you want a simple tester for this 4-pole Flat Trailer Connector, recommend purchasing Item #I26 Curt LED 4-Way Flat Connector (Vehicle End) Tester at the same time. ~$5 and lets you walk away knowing installation is completed correctly.
John A.
7/20/2018
Wow! Thanks for following up. All are working great.
I purchased the tow hitch and wiring harness for my 2007 Toyota Sienna. So much cheaper than my local Toyota dealership. Shipping was very fast. Now for the product, it bolted up very nicely and fits perfectly. I purchased for my 2007 Toyota Sienna to haul some landscaping products on my 5 x 8 trailer. Great product and great price! Very satisfied
I’m very impressed with this company and the quality of the products, both the hitch I ordered for my 2009 sienna and the wiring harness. The quality and fitment was perfect. While you could use a round brush, I preferred to use a tap to clean out the threads in the frame before I installed the bolts. I didn’t have to remove my bumper to install the hitch as I think some others have mentioned depending on model year.
The plug-and-play installation is fantastic... And eTrailer's installation video is very helpful.
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Ben T.
10/27/2017
Thanks, theyre still working great!