Recommended 7-Way Wiring For 2012 Toyota Highlander And Multiple Trailers

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Question:

I am upgrading a 99 Burro 14 camper trailer. My 2012 HIGHLANDER AND IT BOTH CURRENTLY HAVE 4 PIN FLAT oops connectors. I want to convert to a round socket on a bracket, and still have a 4 pin socket for my utility trailer, etc. I may add electric brakes later, and battery charging wire. I dont mind if there are extra unused pins. Round pin vs flat blade? Which is better? Prices are similar.

asked by: Bill K

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Expert Reply:

Since you already have a 4-way flat connector, I recommend using the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires, # ETBC7. This kit will simply plug into your current 4-way and give you a 4-way and 7-way connection option. The 3 remaining functions of 12V power, electric brakes, and reverse lights can be connected or saved for a later time. I recommend making the connections and being ready for the future towing of a trailer with brakes. This kit will give you the wires, connections, and circuit breakers you need to complete the 7-way vehicle side wiring. If you choose not to do that at this time, you can simply use the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole, # 37185, and complete the rest at a later date using the Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer Brake Controllers, # 5506. The 7-way RV connector is the standard for vehicles with a tow package and trailers with brakes. It will give you a more universal application for towing than a flat connection.

If you decide to add a brake controller now, I recommend the Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional, # 90195. This controller will apply the same amount of braking force to your trailer as you apply to your brakes within your Highlander. It has an easy to read LCD display that will help you with diagnostics and troubleshooting without needing to decipher lights and codes. It has 3 levels of boost and is customizable to your desires.

For the trailer side wiring conversions, I recommend the 7-Way Molded Trailer Plug with Junction Box # HS381-9000. This will allow you to make clean connections now, and add connections with ease at a later date. I've attached an article on wiring for you.

expert reply by: Jason S

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Answer 1

To wire your 2013 Highlander with a 7-way and 4 pole connector, you'd first need a functional 4-pole trailer connector. If your Highlander doesn't already have one, you can install it using part #118449. With the 4-pole in place, there's…

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Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Answer 6

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 7

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 8

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 9

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 10

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 11

Hi LaMar, To add a 7-way plug to your 2024 Toyota Highlander SLE you'll need to use the etrailer Universal Installation Kit for Trailer Brake Controllers part #ETBC7. This kit will give you a functioning 4-way flat and 7-way for towing and…

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Answer 12

Hey Ricardo! Yes, the Curt Trailer Hitch Receiver #C82RJ is the hitch Curt is working on for the new 2027 Telluride. This is a pre-order since Curt hasn't finished the design. It does not include wiring. The wiring harness for the 2027 is also up…

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Recommended 7-Way Wiring For 2012 Toyota Highlander And Multiple Trailers

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