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That would be the "universal kit" that they take the car / truck plugs off and re-pin them with the new wires so they plug back into the factory parts.
They are also use to re-wiring as they live across the pond in the land of darkness = Lucas wiring & electrical also known as the Prince of Darkness.
I stll think I would look for a factory truck and cut it's harness and splice it into my truck as it should have all the right color wires and plugs.
Dave ----
I've always wondered how Lucas injects the "Magic Smoke" into their electrical items. I know it's easy to let out.