1968 New Yorker 4Dr HT: Headlights dim with blinker and brake use

While driving or stopped, whenever I used the blinkers or brakes, the headlights and dash lights would dim momentarily. The ammeter would show a slight discharge but never below center line.

At first I thought the voltage regulator was failing, so I switched-out the original with its solid state counterpart. Now while driving, the headlights and dash lights still dim momentarily but the ammeter shows a discharge below centerline. While stopped, everything remains dim and the ammeter...

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Author: T. Aguryte