Project Lexus SC300 Road Racer: Part 10 – Finish Wiring the Back and Prep the Front Harness


Both “legs” of the trunk wheel speed sensor harness prepped for pins.

It’s hard to see, but one leg has the blue-striped wire cut off and the other has the orange-striped wire cut off. We will parallel splice the two grounds together right at the circular milspec connector (properly glueline shrinked of course).


Tom inserts the three pinned connectors into the circular milspec.

You can see the spliced and shrinked ground clearly now. Each of the wires was appropriately stripped and pinned and is now being inserted into the connector.


Tom removes the factory Toyota/Lexus connector from the ABS sensor.

At least in the trunk, the ABS sensor connector is conveniently located inside. We just hacked off the factory connector, put on DTM pins, and shoved it into a DTM cavity. The wheel speed sensor harness would have DTM connectors on its ends, and these would attach to the wheel speed sensors. Great!

As you’ve seen in the previous segment, buttoning up the wheel speed sensor harness was just a matter of DR-25 heat shrink tube and using ATUM hard glueline to make branch “boots”. No big deal, right?

The only thing left to do is to “install” the harness into the car. Now, let’s go to the front of the car and start working on the engine bay.


We also finally got around to removing the steering column lock.

Toyota uses some weird snap-off bolts to secure the steering column lock. During assembly at the factory, the bolts are torqued down and the heads snap off. There is a “bulb” left inside the hole that you have to drill into and then use an extractor to remove. It’s not that diffcult, but it is a little annoying.


Success! The steering column lock is out. Now we don’t have to worry about losing our key. You can also see the miscellaneous tools used here.

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