Walter, not sure if I'll describe this totally accurately, but he said it was the result of a bad ground rack. All my ground wires are mounted on this rack with plug in connections instead of screw in, so some would easily pop out. He is going to rewire it for me with screw in connections. But, even before doing that, I had no issues today since all the plug ins were in tight.
What really impressed me was how he also checked all my electronics and gave me a green light on alternators, power supply, switches, charger, generator connections and amount of power to each swtich. Also checked my voltage and we discussed using the smart engine connections off my GPS combo unit for fuel and more. Told me how they would do it, but said it's really a waste of money.
The guy is just a total class act. Very easy going, very knowledgeable and down to earth. Real good at what he does! Over 20 years in the business.
Told him I got the referral off this Forum, from people I respect and he was very appreciative.