Problem with wipers was the switch. There was no ground path through the switch. I disassembled the switch and cleaned contacts and the two brass tabs that provide electrical ground through the switch body. This cured the problem.
Had this car not been an A/C car, I don't know how one would remove that switch. As it was, I removed the left dash A/C outlet and reached the switch through that hole.
As most of you know, the nut that secures the light swtich and wiper switch to the dash needs a special driver to remove it. I made one using an old 12 mm socket by grinding the face of the socket to create two tabs that engage the slots in the nut.
