Weird windshield wiper gremlin

[MountainGoat1966]

Or maybe the space aliens are messing with me again.
I installed a used intermittent wiper control in my 83 C20 and if I let the truck sit for a day or two without turning the key on, OR if I unhook the battery for a few hours when working on the truck, the wipers do one sweep when I turn the key to the on position to start the engine.
I'm guessing it has a bad control module and I should just go back to the original wiper switch .....At least it worked normal (sorta) giving me slow wipers and the high speed is just a slight tad faster, barely enough to matter.
Neither switch gave me slow and fast wipers, is the same with either switch installed.