Attention: TDR Forum Junkies 
PCM repair, I tried to get to the PCB under all that potting compound and couldn't get it out. I tried heat, solvent, and scraping. I ended up scrapping that PCM and putting in the regulator out of my 72 Dodge parts car. It worked great.
When I rebuilt the truck, my parts truck had a good PCM so I am back in that world for now. Used both ideas, both worked.
The one thing about all that potting compound is that the PCM is pretty water resistant. I have tried water cooling on newer auto computers with the same success. Two dealers and Two mechanics couldn't find the intermittant Cyl 1 misfire on Wife's Suburban. High engine compartment temps caused it. Water on the ECM fixed the problem. Most anything under the hood should be fairly water resistant by design.
Ken
When I rebuilt the truck, my parts truck had a good PCM so I am back in that world for now. Used both ideas, both worked.
The one thing about all that potting compound is that the PCM is pretty water resistant. I have tried water cooling on newer auto computers with the same success. Two dealers and Two mechanics couldn't find the intermittant Cyl 1 misfire on Wife's Suburban. High engine compartment temps caused it. Water on the ECM fixed the problem. Most anything under the hood should be fairly water resistant by design.
Ken
but the "Lord hates a coward" so I proceeded. Couldn't find anything not working and I let it idle with the A/C on for about an hour and the alternator kept charging. The real test will be tomorrow during the day (supposed to reach 100) but I remain optimistic. Oo.
