How to Pick Out Trailer Wiring for 2019 Toyota Highlander

Updated 05/28/2019 | Published 05/25/2019

Products Featured in This Question

Hook Probe Circuit Tester

(60)

$12.41

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

(175)

$18.16

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

(1124)

$45.90

Question:

From reviewing your installation videos and instructions it seems the key to identifying which wiring harness I will need depends on whether my Highlander has a converter under the dash. How do I identify this situation? It seems the wiring under the rear compartments is the same with or without the converter.

asked by: Larry D

Expert Reply:

If your 2019 Toyota Highlander has the factory converter and tow package the port that the 4-way pigtail of either 4-way kit plugs into will be active. So you could test the pins of the the connector with a circuit tester like part # PTW2993 while applying various turn signals of your vehicle and you should see the pins activate. If so, you have the converter and all you need is the # 56042. If not, then you need # C56217 instead.

expert reply by: Jameson C