Trailer Wiring for 2023 Lexus RX 350

Published 07/12/2023

Question:

I have a new Lexus 2023 RX350 FSport without the trailer package. I see you list a trailer hitch for it Draw-Tite Trailer Hitch Receiver - Custom Fit - 2inch Item # DT73QR However, the wiring kit recommended Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit Item # 119190KIT0 seems generic. The instructions do not indicate where in the vehicle are located the wires to which is should be connected or their color code. I know the turn and brake signals are multiplexed but do not have any further information. Any advice?

asked by: George G

Expert Reply:

For your 2023 Lexus RX 350 we only have universal style trailer wiring options like the Tekonsha part # 119190KIT which does require testing taillight wires to determine function and wire to the converter box.

I wish I could be more specific but you would need to use the included tester to find the correct circuits.

expert reply by: Jameson C