How to Add 5-Way Wiring Connector to a 2024 Toyota Grand Highlander With Factory 4-Way Connector

Updated 12/02/2024 | Published 05/02/2024

Question:

I have a 2024 toyota grand highlander with a factory installed tow package which includes a 4 pin connection. My boat trailer has a 5 pin connector. what adapter is available to connect the vehicle 4 pin to the boat trailer 5 pin so that all the trailer lights function correctly? If there is one, is it difficult to install?

asked by: Mark G

Expert Reply:

Hey Mark, thanks for reaching out!

In order to get your 2024 Toyota Grand Highlander to function with the 5-Way on your trailer you'll need to install the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036. This plugs into your current 4-Way and you splice it into your reverse light function. This comes with a quick-splice connector so once you find the right wire on your Grand Highlander it's a simple matter of clamping it around that wire and the blue individual wire and you'll be good to go!

expert reply by: Jon G

Noah

9/3/2024

I believe you meant to say "splice it into your reverse light function".

Jon G.

9/3/2024

@Noah Yes, that's what I meant to say - thank you! (I updated the page to reflect this)

Noah

9/3/2024

Also, the right thing to do would be to use a relay

Dave K.

12/1/2024

What is the best location to tap into the reverse light in order to have backup lights come illuminated on my trailer? Video is for a 2015 Highlander and would like to know if it still applies to a 2024 Grand Highlander. Already punched the wiring adapter. Thanks.

Jon G.

12/2/2024

@DaveK Typically people will tap into the 3rd brake light on the tailgate for a smaller SUV light the Toyota Highlander. I don't have a specific wire that you need to tap into, but you can use a probe-type adapter # PTW2993 to find the correct wire.