How to Determine Correct Trailer Wiring Harness for 2019 Toyota Highlander

Updated 08/07/2020 | Published 09/14/2018

Products Featured in This Question

etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"

(1349)

$236.47

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

(1122)

$45.90

Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

(74)

$24.64

Question:

trying to pick out a wiring harness for my 2018 Highlander. how do i know if i have the tow package? i've already selected the etrailer hitch.

asked by: Mark

Expert Reply:

Take a look at the rear of your 2019 Toyota Highlander in the spare tire compartment. You should be able to find a white connector like you see on the right hand side of the picture I've attached. If there is nothing plugged into that connector then you don't have the tow package. If there is something plugged into it, it should be a wiring harness with a converter (like is shown) which means you do have the tow package.

If you do have the tow package I recommend the Hopkins harness, part # HM11141825, which plugs into the converter you already. If you don't have it, instead use part # C56217 which plugs into the first connector I mentioned and provides you with the converter and the 4-way trailer connector.

expert reply by: Charles S

click to enlarge

Jack H.

7/30/2020

2018 Highlander XLE - As far as wiring goes, I looked at my fuse box and the trailer fuse between the two 7.5 amp fuses is empty, so I assume that there is no tow package installed. Would this be a correct assumption?

Jon G.

8/7/2020

That sounds like it could be right. You could also verify using the method that Charles mentions above as well as reaching out to your local Toyota dealer with your VIN and they can confirm whether you have it or not.