Please help!! 1971 340 duster having major ignition wiring headaches.

67Dart273 said

Oh come on. Nobody needs to break out the scope to troubleshoot a wiring/ no spark problem.

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I agree. My point was to show why spending time measuring voltage at the coil positive or negative is not that helpful for solving wiring problems. Sassygrnduster is hardly unique in doing this and then wondering why we can't provide an answer.