Starter engages in run position

Good start. Move the switch a few clicks to the CCW to the "200" ohm position

Here is what you are trying to find out..........

The start wire should be "open" with the key off in other words it should be a piece of wire connected to "nothing."

ONE THING that might complicate this is "you might" have the dreaded seat belt interlock." Look under the hood for a box about the size of a horn relay with a large red button. find the two large yellow/ yellow tracer wires going to it and cut them and join them permanently together. This is the reset box for the seat belt mess "if you have that"

What is this relay for?????

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If you still show a low resistance the first thing I'd try is disconnect the ignition switch harness connector and check again

If the wire goes open with switch disconnected you may have a bad ignition switch. If not you most likely have a wire melt in the harness OR someone has hacked up the wiring somehow