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I don't know about the '92, but for my '94, I just went to "fleet farm" and bought a "wiring harness" ... comes with a diagram, zip ties, and grease ...
I know that local automotive stores in Canada sell the wiring harnesses for a lot more, I picked up a harness for 2 bucks. I thought it would be interesting to try and wire it up myself since I've got the tools for it. It's only a 4 wire harness. I guess I'll call my local dealership, see what they say.