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It is in the IH1 connector at position 6 in a 91 and I'm pretty sure it's the same in a 92. Basically it's the only solid blue wire in the IH1 connector. It might be grounding to something. If you didn't tape it or disconnect it, it might be touching another wire or the body. I was going to use that wire as the power source for my ODBII port. I think it in the old 3.0 system it went back to the diagnosis port on the engine.
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'90 4Runner | 3.4 Auto | 1.5" BL | 31" BFG A/T | Smitty built bumper
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