Im in the process of rewiring my 84 Pickup 22R  Ive done days of research and cant find where this blue wire goes. Ive looked all in the engine bay, under the truck, and driver/passages ride harness running into the cab no where do i see a blue 10 gauge wire. I need some type of diagram that shows where wires go from the engine fuse black to the source. It comes from the emissions relay.

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