Wednesday, April 22, 2026

The Supra Files: Starting to Wrap Things Up....

 On the Electrical System, that is.

There are several wiring harnesses in the engine compartment, The "Main" one starts at the battery, connects to a group of wires that feed the driver's side of the car, and travels across the underside of the top of the radiator support, connecting to the alternator, and another harness that feeds the passenger's side of the car.

The next harness also runs along the same path, but handles low current switching for lighting and the horns.

The third harness runs from the Engine Control Unit (ECU) to the engine and is the "electronic" part of the wiring, as opposed to just a bunch of DC circuits. 

This is what it looked like after I pulled it from the car.

 

And this is it after cleaning.

 Each wire was cleaned and inspected. Several lengths had to be replaced due to brittle, cracked insulation. Each connector was cleaned, inspected, and it's O-ring replaced. Then I installed it, along with the lighting harness, back from whence it came.

And I cleaned, inspected, and rewrapped the "Stub Harness" coming out of each fender.

 
 
  


This is the next one I'm working on. It runs from the ECU (Engine Control Unit) to the sensors, injectors, and ignition system.

It's a mess. More tedious cleaning, repairing, and putting new connector housings on.

 

And I was able to get the front anti-roll bar and brackets back on the car. The two rods are the "Lateral Locating Links" (aka Strut rod bars) for the front suspension

More to come, when I get a round tuit, which have been in short supply lately.

Keep them heads swivelin', and always check your six. 

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The Supra Files: <i>Starting to Wrap Things Up....</i>

 On the Electrical System, that is. There are several wiring harnesses in the engine compartment, The "Main" one starts at the bat...