I started at the antenna. Just disconnected the power plug at the power antenna and problem solved. I don’t understand why just yet as there doesn’t appear to be a power draw at the antenna (it's not hot to the touch or making any noise) and works as it should. Further investigation should produce the answer.

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Daryl Miller
84 380 SL
51 Ford
61 Chev 409 project
62 356
80 928
88 928 S-4
97 528
03 Forerunner