JW, Heres a part of my Troubleshooting Procedure which may help. It uses a test lamp at the input distributior terminal or else the coils to distributir terminal to diagnsoe possible points or grounding or shorts or condensor problems. If it dont help I have included a URL link to the entire testing procedure.
3) Next, place your voltmeter or test lamp over on the coils other low to distributor terminal side, turn her on and crank the engine over.
4) A test lamp there should flash ON (when points are open) and OFF (when points are closed) as the engine is cranked slowly.
5a) If the lamp never comes on there, the coils primary is bad/open,,,,,,,,,,or the points are never opening,,,,,,,,,or theres a shorted/bad condensor (remove its lead to points and see if lamp comes on, if so, bad shorted condensor or its wiring),,,,,,,,or the points wire is shorted,,,,,,,,or the distributors side pass thru stud is grounded (use ohm meter to test that),,,,,,,,,or the points may have a shorted spring.
5b) If the lamp never goes off as engines cranked, the points are not closing or are bad,,,,,,,,or the wire or circuit is missing from the distributor to the points,,,,,or the distributors not well grounded to the tractor.
She cant fire the coil unless its low side is getting a conductive ground return path via closed points and then the circuit is open when the points open.
Be sure the condensor or its wiring is NOT shorted out and see if the lite comes on (when points open) with the condensor disconnected. If removing the condensor makes her spark, replace the condensor
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