87 V10 Wiper problems

[biggsteve97]

I have a custom 87 Chevy V10 Silverado with over 436,000 miles on it and a few years ago I started having problems with the wipers. First they wouldn't park intermittently. When I turn the switch off they just keep going. I would have to turn the switch back to mist briefly to get them to stop. Then the intermittent function was no longer working making pretty much all intermittent settings the Lo position, while Lo and Hi settings still works like they should. I have replaced the intermittent module and that changed nothing. I have not been able to figure out if it is the switch or if it is the motor itself. Anyone experience this before or have any thoughts?