Elec woes, crank, no start after running then parked.

I recently had crank no start issue and from advice of others on this forum measured volts at coil while cranking. I had 8 volts. After cleaning firewall connectors, new ignition switch, new battery I ended up with 11 volts when cranking. But I believe primary issue was red battery wire in bulkhead connector had corrosion.

But through all the thrashing around I believe I left key in Run position engine off far too often and too long ended up with coil secondary resistance 1.5 kohms above spec and burned up Unilite module. Both were only a few weeks old. Right now car is up and running with a single point auto parts distributor and auto parts store coil.

Make sure ECU, engine, and voltage regulator well grounded. I verified my grounds via voltage drop test between the above and neg battery terminal vs ohm test which won't test under load and less reliable.