If it's the layout of the wires behind the dash you are looking for rather than basic electrical principles an option is to look at Phil Waterman's web site (although he concentrates on Chevs). He's got sketches of the hookup of the wires behind his late HUP dash. If the layout of the gauges and switches is the same ,the layout of the wires also has to be similar (as far as the actual instrument panel is concerned).
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