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Trailer Wiring Recommendation for 2017 Toyota Highlander  


I am writing to inquire about the best trailer harness and wiring option for a 2017 Toyota Highlander SE AWD. Most of the photos online show the trailer wiring coming out under the back latch. I am curious if there is a part which allows you to run the wiring through the floor and out under the vehicle. Ideally, Id permanently mount the wiring to the trailer hitch itself. Can you please advise on options? Thank you in advance!


Expert Reply:

The recommended trailer wiring harness for your 2017 Toyota Highlander is the Tekonsha part # 118449 which I attached an install video for. We like Tekonsha harnesses the best as they tend to be the most reliable.

If you can find a grommeted hole in the rear cargo area of your vehicle you could route the 4-way through that, but you should note that it is actually preferred to keep the trailer wiring stored on the interior of the vehicle.

Having it stored there keeps it protected from corrosion and damage from debris that could be flying around under the vehicle as you are traveling. The thick rubber seal on the rear door frame will protect the wiring as you shut the door on it as well.

expert reply by:
Jameson C

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