All is good in there John. Still scratching my head.One post is power in the other two posts are power out. It not you have a brake down in side. Take the fover off and see if a insulator is damaged.
Thanks PaulDave...
You might have a defective flasher. The original flashers were Tung Sol units. I believe that the 617 is the 12 volt version of this flasher. If you need one, let me know, and I will start the search. View attachment 46534