Supra Tail Light Change

I had figured out how to mount the C7 tail lights and Kevin had sorted out how to fit them into the body. So it’s time to just do it, right? Nope… Brian mentioned the 2020-2021 Toyota Supra tail lights which weren’t out when I settled on the C7 lights. They are more modern, exotic and make the C7 lights look cheap.

The outer top corner has a big radius which isn’t even close to fitting the body. I’ll need to recontour the top corner of the body from the middle of the rear wheel well to the edge of the tail light. There is also a pretty big front-to-back curve which is OK because I’m going to stretch the back of the car 5-6” to make room for the mufflers and a proper diffuser. It will be a lot of work, but worth it in the end.

Note the gap between the top left of the tail light and the body.

The side of the lens will be buried inside of the body

I couldn’t find a wiring diagram or harness part number online so I went to a Toyota dealer. The parts guy couldn’t figure it out either and he asked the techs. To determine the part number for the harness they need a VIN. To get a wiring diagram the car must be connected to their computers! WTF happened to the Right-to-Repair Bill?

It doesn’t look like I’m going to be able to get a sub harness, a pigtail or figure out what the connector is so I’m going to solder wires to the pins and fill the socket with potting epoxy. The first step was to figure out the wiring without letting the smoke out:

  • Big Pin: Ground

  • Small Top Pin: Brake/Turn Light (12V)

  • Small Middle Pin: Running Lights (12V)

  • Small Bottom Pin: Doesn’t appear to do anything, it might be diagnostic related.

The lights look great when lit as seen in the video below.

Kevin did some initial sketches. I need to figure out which direction I want to go…