First, you need to find a real mechanic, not a parts swapper. There should be two circuits that get voltage with the switch in the "run" position, one for ignition, and another for "accessory". Depending on the year and application of the switch, there might also be an "IGN 2" position on the switch that operates only with the switch in the "start" position. The circuits such as the wipers and fuel gauge, etc. need to be wired to the ACC position, with only the circuit to the upstream side of the ballast resistor going to the IGN 1 terminal. With the switch in the "start" position, only the starter and the downstream (coil) side of the ballast resistor, (connected to the IGN 2 terminal) will be hot. When the start switch is released, the IGN 1 and the ACC terminal will have voltage.
Jerry

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