Troubleshooting Curt Vehicle Wiring Harness 56083 On 2021 Lexus RX 350 Not Having Power

Updated 09/21/2021 | Published 09/20/2021

Products Featured in This Question

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

(442)

$25.38

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

(1124)

$45.90

Question:

Howdy.. Im assuming that my 2021 needs something to power the trailer plug? After installing was easy, I noticed that there was no power to the plug. All was snug and tight. Is there a fuss or something that has to be installed by the factory before you can us the trailer wiring harness?

asked by: Martin L

Expert Reply:

The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # 56083 requires your 2021 Lexus RX 350 to have the factory tow package which includes a factory installed module to power the trailer lights.

Since your harness does not have power I recommend checking that there is a module plugged into the 10 pin connector which may be inside the luggage compartment, on the passenger side below taillight, behind little plastic removable bin.

If no module is plugged in you will need to install the # C56217 as it includes the module needed.

If you do have a module then you will need to check the engine bay fuse compartments for any fuses relating to trailer wiring, and make sure that they are installed. I was unable to find a fuse box diagram for your vehicle so I do not have a specific fuse number for you but on the lid of the fuse box there should be a breakdown of the functions for each fuse.

I included videos of the products mentioned for you to take a look at.

expert reply by: Samuel C