[Chubbysumo]

For my 2024 Sienna, I purchased the Toyota converter PK960-08B03 which installed easily.
It terminates in what I think is called a T-one connector. A square connector.

So I purchased the PK960-08B05 harness to run to the hitch.
The problem I have is harness seems short by about 6 inches.

I also am not sure how to run this from the driver's side area to the center. Do I run inside the bumper cover? How to secure the harness?

Does anyone have any pictures of what they did? I found several posts, but not much on routing through the bumper cover and out.

Have you seen where the factory wiring goes from and ends up on the factory draw bar?

Tow Hitch Receiver with Wire Harness

its in that small covered spot left of the receiver, and winds up about 6 inches short but its just attached there, and then you pull the trailer connector up to it with an extension.

 

[Chubbysumo]

There is 2 parts to the factory wiring adapter. The first part is the plug that adapts from the vehicle to the trailer harness. this has a small pigtail that comes out and goes out the grommet. Then, there is another part that goes down from that and connects to a piece that is already on the OEM draw bar.

That square metal cover on the left side of the draw bar covers the wiring harness that you don't have. it goes around to the left of the draw bar and connects to the pigtail you have. I can't get the left under panel off because the pins are frozen into the plastic because winter, but under there is a short run that goes to the plug that comes off the wiring harness you have. this pigtail comes pre-mounted on the OEM drawbar, and is not sold separately as far as I can find.

 

[Chubbysumo]

as a side note, the complete OEM draw bar kit, which is like $832 includes the wiring harness, the new plastic cover for the left side, new pins, and the draw bar, and the 6 bolts. The wiring pigtail that is on the draw bar does not have its own part number, which the rest do, otherwise you can cut the left panel a bit to accommodate the wiring going thru it.