Watch this video and pause at 1:30. His hand is pointing at both the plug and where the connector will be taped (if equipped). Some people just remove the plug from below and can see the connector and plug in. I was able to remove my tool tray and then get my hand under the side tray to pull the connector loose from the tape that held it to the harness.
This video is for an install of an aftermarket harness in a RX that is not pre-wired but it shows where the factory wiring would be if equipped.
We have towing prep package. Also I ended up getting the harness from Lexus for $50. It plugged right in, also it was a bit of a PITA to put everthing back together. I'm getting ready to head to NC with my ZX-14 in tow and the lights worked on the trailer.
Does any one have the harness part number. i want to get a non-OEM harness ( I have the 400h with tow package) and It looks like it is just wires with the connector at the end. I don't want to pay $50 for it. I do not want to install the T-connector since i already have a connector.( I think the second link is mislabeled t connector)
The sites say this do not fit but it looks like it my. Any thoughts.