Anyone have an rb s13 lower conversion harness out of the vehicle?

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Motor and trans are out of right now for rebuild and im wanting to redo and clean up my lower trans harness.

Wondering if anyone has one out of their car they can take pics of and maybe give me length measurements

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The mess im trying to clean up

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Any wiring gurus help me out.... this harness was fully functional before pulled with the exception of my reverse lights not working. Just ugly and open.

Confused on a couple things

This plug. Has 2 thick wires one white and the other black. Both go to eyelet style ends. Pretty sure one for starter the other for alternator.... which is which?


This plug. Has 4 wires coming from it. Main colors being red, black, brown and yellowish. Idk if i damaged or cut when i removed it but the red, black and brown wires dont go to anything currently and the yellow one goes thru the harness to another plug that has 2 wires, the other being black




If anyone have any idea to why my reverse lights never worked please lmk what i can check to eliminate this harness as a possibility.

Help greatly appreciated. Thanks.

[mixeds14]

The 4 wire plugs looks like the alternator plug the other one, looks like one that plugs near the fuse box buut not sure

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First plug i believe i figured out. Both wires go to alternator.

2nd plug still clueless, beginning to think its extra and i dont need it. But i still want to know why its there and what it is supposed to be for. Looking at the s13 lower harness layout im guessing the 4 wires should go to exhaust gas temp sensor and the power steering oil pressure switch? Both of which i dont have connections for on this harness.

Any input?

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2nd plug yellow wire goes to one of the trans sensors. I think the neutral switch? Not the backup switch which i found to have a break in the wire. For now im leaving the plug and removing the brown red and black wires since they dont go to anything