Windshield Wiper Help Please

[Jimbo0076]

Working on my '85 K20 that has had issues with the wipers since I've owned it(over a year) and I've just lived with it until I can't stand it anymore. It has interment wipers and the washer is separate from the motor itself. Problem is they will not shut off when in the off position but if you flick the switch(stalk mounted on the column) back to the mist function then they will instantly stop but will not return to the park position. If you hold the mist function back it will make a revolution and if I time it right it will rest close to the park position at the bottom of the windshield. High and low works but no intermittent wipers at all. I figured it to be the delay module so bought a brand new Delco unit and installed and nothing changed at all. By passed the module by plugging the to connections together with no change either. I've read up what I can find about the wiring diagram and read that with the wiper switch unplugged that if I ground the black/blue wire from the switch going to the motor that it should "park" but it does not. I'm about to believe that the motor park cam is bad causing the no park issue but I am not certain. But the no intermittent wipers no matter what is another issue that I can not resolve. I figure it either has to be the switch or the motor but I hate to start tossing parts at it unless I know what the problem is for sure. I have most of the wiring diagrams in the back of old manuals but I just can't seem to figure it out. Any help would be greatly appreciated! Sorry for the long post but I tried to cover the bases as to what I have already checked.