have 2006 pt cruiser with windshield wipers that suddenly began running by themselves. How can I shut them off?

the problem is obesity in the broken wiper switch, to disarm them the motor should be under the cow vent at base of windshield , remove vent and unplug, or get ahold of the wires at that broken switch and unplug that connector! that's where youll be working to replace the switch anyway

This is an issue with the whole switch attached to the control arm, It contains all of the mechanisms to operate the wipers and washers as well as speed and intermittency. All you need to do is go to a dealer or parts store on the net, a used parts dealer will have this part as well, at a greatly reduced price. Remove the covers that will expose the unit itself, remove the clip that contains the wiring, generally it's a white plastic or nylon piece with a clip on one side, pry the clip with a flathead screw driver and install the new one, button it up after you check your work and make sure the part functions correctly. Good Luck

Honestly all u guys sound like ur guessing..what evidence ia there of isolating the problem?