I'm still not convinced it's fixed. If it does it again it will be the terminals on the ECM. Use a Jeweler's file to clean the pins in the connector. The ECM corroded terminals and corroded battery terminals act exactly the same. It will start 10 times and then be dead, maybe interior light. Hit the horn and then nothing, horn draws alot of power. Come back 1/2 hour later and it starts and drives away. I chased that for longer than I'd like to tell on my Final Edition Wagoneer. I purchased a new ECM and it started right up for a few weeks and then the same thing. I used a tiny file and cleaned the pins in the connector, that fixed it until the next time. I suppose you should clean the pins and then use white grease in the connector to keep water from corroding the pins again. I think after you file then you might remove some of the protective coating, because it doesn't last as long. White grease or maybe di-electric grease should do it.
PS I kept a set of files in my glove box, also great for cleaning trailer plugs. $5 on sale at Habour Freight or $5 at Carlisle last week.
1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers