I'm thinking that an electrical failure of that scale is just a bit too coincidental with the first power-on after replacement of electrical parts.
Have you considered that you may have hooked up something incorrectly, or broken one or more other connections in the process of replacing your coil?
Double-check that you did indeed connect the new ignition coil properly, then check every possible wiring connector near the area you were working in, as well as the fuseable links over near C500.
1985 2M6 SE (his)
1984 2M4 (hers)
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