Trailer Wiring Harness Recommendation for 2006 Toyota Highlander Bypass Incomplete Factory Wiring

Question

Question:

I have a 4 pin out on a bracket next to the hitch,no signal. I have the toyota hitch or assume because the cap says Toyota. the 4 pin flat went back and was ty-wrapped to the frame. found the hole and pushed that square 4 pin into the drivers side brakelight area under the storage area, I found a mating connector 4 pin square... plug it in and nothing. check it and no voltage. made sure the fuse was in up in the fuse box. so I have been doing enough research to see that the with factory wiring, the harness you sell plugs into a 10 pin connector. and I have that 10 pin connector. So looks like I need the adapter/connector you sell. but I feel I must just be missing something. the car obviously was equipt with the towing package. I had to plug the 4 pin flat in via the 4 pin square? okay so they didnt at the factory. but why would I be missing the adapter that plugs into the 10 pin and then goes out to the 4 pin.sure enough one side of the 10 pin has my signals and the other side goes to the 4 pin square I mentioned, but nothing to link or adapt in other words the 10 pin is not plugged. do you know if that was an upcharge and you didnt get the adapter unless you specifically order it? or is the factory one hidden. there is absolutely nothing I can find anywhere in that compartment that would plug into the 10 pin and make it work.

asked by: Scot C

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Expert Reply:

Trying to complete factory wiring on a vehicle can be a headache as it can be very difficult to find out where the missing link is on the wiring of the vehicle. It's possible you could find a wiring diagram for your vehicle and trace everything that way to verify that everything is good but I have an easier overall solution that's priced pretty well too.

The trailer wiring harness part # 118413 would make your life much easier. All you have to do is plug the connectors of this harness inline with the taillight connectors of your vehicle and you'll have a fully functional 4-way.

I attached an install video for this harness that shows it installed on a 2006 Toyota Highlander just like yours.

expert reply by: Jameson C

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Answer 1

Your 2006 Toyota Highlander does not have a brake controller port under the dash of the vehicle so we do not have any install harness that would work. You will need to start with a 4-way (if you do not have one). For that you would want the #118413.…

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Answer 2

If your Highlander has an active tow package plug located in the driver's side rear of the cargo area under the floor (see linked instructions for part #C56107 to see where plug is located and how to access it) your Highlander has the tow…

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Answer 3

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 4

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 5

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 6

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 7

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 8

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 9

Hey Dominick, thanks for reaching out! The Draw-Tite Max-Frame Trailer Hitch Receiver #75105 weighs 48-1/2 lbs. Just out of curiosity, what was your reasoning behind needing to know the weight?

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Answer 10

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 11

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 12

Hey Ron, congratulations on the new trailer! I have a Jay Feather myself and love it. You're definitely off to a great start with a weight distribution hitch, it will make a world of difference towing that trailer with your F-150. The Weigh Safe…

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Trailer Wiring Harness Recommendation for 2006 Toyota Highlander Bypass Incomplete Factory Wiring

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