What is this wiring harness, plug, connector for?

Checked the forum, it's not the wiper fluid. Maybe it's a flux capacitor adapter.

This is an sr5 with fog lights but they double as drl.

 

It's a CAN-BUS Junction Block & Connector.

 

wow. thanks. This forum is awesome.

 

@caribe makaira is awesome -- one of the TW wiring gurus!

 

What's it do?

 

Basic CAN-BUS stuff.

J/K

I have no idea either.

 

I went a googling, and found some things I don't understand. I wonder if the Pros or OffRoads have things hooked into them, or if it's just a shared wiring from a 4runner or something. Don't know what it's good for, but I'm glad to have one available if I need it. I probably paid the dealer 1200 for the CAN-BUS prewire option.

 

Ah, the unanswered million dollar question. Looks like the canbus J20 junction connection for the blind spot monitor (BSM) if you have one, I don’t.
https://www.ttguide.net/check_bus_5_line_for_short_to_gnd-1538.html