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I lost spark in my truck.

In the distributor there is a bare copper wire like a ground screwed with the points, where does the other end screw to? I had to take it all apart and I forgot where it screwed to? The picture in the manual is too vague to show the wiring.

What is an easy way to see if the coil is bad without going and buying a new one? I did the ohm tests like the manual shows and it is in range. But i want to test if it is sparking without jolting myself.

If it is a bare copper ground wire it should have one end connected to the mounting screw of the points on the breaker plate (which moves ) and the other end connected to the distributor body ( which dosen't), to ensure a solid ground.
To test a coil, disconnect the coil wire at the distributor end and hold it about 1/8 inch from bare metal.
You can hold the wire with a plastic pliers to prevent shock. Have a buddy crank the starter a bit and watch for a spark. This of course assumes the points are working ok.