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Custom Fit Vehicle Wiring > 2013 > Toyota > RAV4

Curt Custom Fit Vehicle Wiring for the 2013 Toyota RAV4

Curt Custom Fit Vehicle Wiring

ratingratingratingratingrating (13 reviews)

Code:   C56166



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Shipping Weight: 1.67 pounds


Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 2013 Toyota RAV4

Quickly and easily install a 4-way trailer connector on your Toyota RAV4 with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


  • Provides a 4-way flat trailer connector at the back of your Toyota RAV4 to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily
    • Locate connection points in rear cargo area
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your Toyota RAV4's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading Toyota RAV4's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector
  • Made in the USA


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your Toyota RAV4's wiring harness, which is located in your rear cargo area. You will have to remove interior trim paneling to access these connection points. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.

Once installation is complete, the 4-way 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.

Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.

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 Toyota RAV4's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This 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 Toyota RAV4 operate.

Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.

Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.

Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.

56166 CURT T-Connector - Surface Mount Technology - 4 Wire

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56166

Average Customer Rating:  ratingratingratingratingrating4.4 out of 5 stars   (13 Customer Reviews)

- C56166

ratingratingratingratingrating by: Rich Stro09/25/2013

Is this review helpful?

The Trailer Hitch apparantly had been damaged in shipment because the spacing between the mounting holes was too close by 3/8". I had to use a Hydraulic bottle jack and 4x4 wood block to expand the mounting pads so they wold fit. I think they need to put some foam in the packaging.. so when shipper drop the box it doesn't cause the mounting plates to get closer.. Other than that no problem only took 15 minutes to install 101421

- C56166

ratingratingratingratingrating by: June B.02/24/2014

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Received hitch in a few days. Fit perfectly. The recommendations I received from Katie D were exactly what I needed to make my decision. Product arrived in perfect condition. Very pleased with product and service. Have recommended your site to someone else who needs a hitch. Thanks for your help. 117373

- C56166

ratingratingratingratingrating by: CJ09/04/2013

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Installed nicely but the instructions were a little vague on where to best mount the module for the RAV4 and where to put the ground screw. I put the module on the flat-ish spot on the driver's side in front of the tail light. I put the ground screw in the 3/4" joint running up the door frame behind the panels and I just used the self-drilling screw to make the hole. The edges of the panels you pull out have sharp spots so be careful to not get little cuts and scrapes. as you're reaching in for the connectors. I ran the power cable inside the RAV4 and pushed it through the big rubber boot under the driver's dash. (using a long springy rod to get string through to pull the wire.) From there it was an easy run to the battery. All in all it wasn't a bad install at all. It took some patience and rereading the instructions a few times to get it done but very doable. Don't rush if something doesn't look quite right because the instructions are correct if a little vague in spots.98149

- C56166

ratingratingratingratingrating by: Lee C.03/20/2014

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Last time I purchased from etrailer was 9 years ago until this time and as I remember all was 5 star back then also. As usual an excellent online buying experience from Product arrived in 3 working days and was the correct hitch plus the wiring harness for my 2014 Rav4. High quality products which makes even installing a trailer hitch no problem. I did think I should have received the Curt receiver hitch plug as I have on other trailer hitches. The cost to ship a plug now costs less than the shipping. The only bummer on the whole deal.121396

- C56166

ratingratingratingratingrating by: Brent Frazier03/12/2014

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Hitch installed in less than 15 minutes with another pair of hands. The electrical harness was a bear, though. The connectors were difficult to disconnect because of the tight space. Went well from there, though running the wire to the battery was interesting. I ran the wire through a hole punched in one of the tire well drain plugs, then sealed with silicone. Electrical took about 3 hours. Works fine.120418

- C56166

ratingratingratingratingrating by: Gene F.03/06/2014

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This takes the longest time to do because on the RAV 4 you have to remove the rear side panels. The left side wires could be longer so you can mount the convertor box in spare tire compartment. I spliced longer wires on mine.118610

- C56166

ratingratingratingratingrating by: Steve01/17/2014

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Installed this product on a 2013 Toyota Rav4. This wound up being one of the more enjoyable parts of adding a trailer hitch to my new car. The unit was pre wired with Toyota connectors so all I had to do was plug it in. Fortunately, the interior panels that needed to be removed were no problem on the Rav4. Other vehicles may be more problematic but it works as advertised114093

- C56166

ratingratingratingratingrating by: Donald Drouin09/04/2013

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My box was delivered and the top of the box was opened and then re-taped by someone. I asked the UPS guy if all the parts were there and he said "I hope so". I have not had the time to go through the box but I will at my earliest convience.98167

- C56166

ratingratingratingratingrating by: Ronald04/01/2013

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The harness arrived in good condition and fairly quick, since it is a new item for the 2013 Rav 4. The install is not exactly easy. It took myself and a friend (an Aircraft A&P mechanic) 4 hours to complete. We were being careful not to break any interior plastic which added to the time. My wife did not like the idea of hanging the connector out the hatch so we decided to run it our the bottom next to the spare tire through a rubber grommet ..then sealed the grommet with silicone and mounted the flat connector to the provided are on the hitch. It might be helpful to test the connectors provided with the harness before trying to disconnect the connectors on the vehicle. The vehicle connectors are in a very tight spot and trying to unlock the tab is not easy. Pictures of how to unlock the tab connectors on the instructions would have been helpful. I thought it would be a good idea to teat after the install with a volt/ohm meter. To my surprise, I had 12V at each leg without anything turned on. We then connected the trailer and all worked as expected. We still don't understand it but it works just fine. Some serious magic in that little black box LOL. Ron73681


That is exactly why we work so hard to have videos of our products. Sometimes a different look can make all the difference in an install. As soon as we have a 2013 RAV 4 come through our shop, we will have wiring videos available on the site.

Patrick B - 4/4/2013


Getting a 2013 rav next week. Any additionall light you can shed on removing plastic pcs. or where you ran hot wire would make me forever in your debt. I am a little bit of a detail frek also.Thanks.Mike

comment by: mike - 4/11/2013


I will pass your question along to Ronald. Keep an eye on this review in case he decides to follow up.

Patrick B - 4/24/2013


Mike,One suggestion I have for removing the plastic interior panels is to purchase a set of nylon pry bars designed for this purpose. I used these from Harbor Freight tools:http:/ and worth every cent!Along with the screws and bolts mentioned in the instructions, there are many plastic retainers that will be pulled straight out to remove. Be careful not to them since the do slide out of their mount brackets.I ran the hot wire to the battery through a rubber plug under the spare tire and under the Rav to the front. There are plenty places to tie wrap along the way forward and secure it. I did run it through a hole in the frame and made sure to use a grommet to assure that it did not chafe and short out.I also ran the 4 way plug through the same rubber plug under the spare and routed it to the tab on the hitch and secured it. All wires were then sealed with silicone on the rubber plug.I hope some of that is a help for you.Ron

comment by: Ron - 4/25/2013


Thanks for the follow up Ronald!

Patrick B - 4/25/2013

- C56166

ratingratingratingratingrating by: Patrick04/13/2013

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Super fast service. This is the way businesses are suppose to be run. Ordered on a Sunday delivered and installed by Thursday. Everything was there and in perfect shape. Will be ordering more. Thank you.75733

- C56166

ratingratingratingratingrating by: Jim MIko04/02/2013

Is this review helpful?

Fit my 2013 RAV 4 as advertised. Easy to install except for the line to the battery, that was a pain. I ran the line from the battery through the interior of the car as it is more protected.73807

- C56166

ratingratingratingratingrating by: J. Ledoux03/06/2014

Is this review helpful?

This is my second order curt T connector set . The first one easy I and this second one should be the same. the shipping good and thank you for your concern.118603

- C56166

ratingratingratingratingrating by: Scot S08/25/2013

Is this review helpful?

Save alot of time .. Better then do-it selfer and piecing it together 96831


Which hitch and wiring kit do I need for a 2014 Rav4. The hitch will be a class II.

comment by: Larry - 3/20/2014


I have added a link to all the hitches that will fit a 2014 RAV4. There is only one Class II 1-1/4 hitch offered, from Curt. Most of the hitches offered are Class III 2 inch hitches. I would strongly encourage you to consider a Class III, 2 inch hitch instead of a Class II. There are far more options as far as bike racks and cargo carriers for 2 inch hitches. Even if you will not ever need the towing capacity, a Class III 2 inch hitch will be more versatile. Curt offers a plug-in wiring harness, part # C56166. You will need to run 1 wire all the way up to the battery and use the crimp connectors to make the connections. This separate power wire enables the entire trailer wiring system to isolate the power draw off of the vehicle.

Patrick B - 3/21/2014

Ask the Experts about this Curt Custom Fit Vehicle Wiring
Expert Answers about Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56166                                            Do you have a question about this Custom Fit Vehicle Wiring?

  • What Size Wire Gauge Should be Used to Extend the Power Wire for Trailer Wiring Harness # C56166
  • Typically, routing the power wire on the inside of the vehicle uses up more wire than routing it underneath. But either way you still need some extra wire so lets look at what you will need. You could get away with using a larger gauge, especially over such a short distance. But I would go ahead with some 12 gauge wire like # 12-1-1, sold in increments of 1 foot.
    view full answer...

  • Curt Trailer Hitch and Wiring Harness for a 2008 Toyota RAV4
  • Starting with a trailer hitch the Curt hitch for your 2008 Toyota RAV4 is # C13149. This is a 2 inch hitch rated for 525 pounds tongue weight and 3,500 pounds gross trailer weight. But you will want to consult the vehicle owners manual to determine the capacities of the vehicle. Whichever is lower, the hitch or vehicle, is the capacity you need to go by. I have linked the instructions and a video showing installation of this hitch for you. For a Curt trailer wiring harness, use # C56165. I ha
    view full answer...

  • Tips on Routing Trailer Wiring Harness Power Wire on a 2014 Toyota RAV4
  • Running the power wire to the battery when installing Curt trailer wiring harness # C56166 on your 2014 Toyota RAV4 is not all that difficult, it can just take some time depending on how you want to route the wire. How much time it takes varies. There are a few different methods to route the wire. I have included a link to our help article that covers tips on routing the power wire. It must be attached to the battery, no other power source will do. This is because the harness has only been te
    view full answer...

Toyota RAV4 Accessories

Info for this part was:

Photos by:
Theodore B

Written by:
Lindsey S

Expert Research:
Michael H

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