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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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