Weird issue here. I have a 1993 1500. When it is raining, I have an issue with my wipers where once I've turned them on, they will run at normal speed when the selector is on the intermittent mode, and even if I turn the selector to off to turn the wipers off, they'll still keep running for a while! I'm not certain that it isn't the switch mechanism on the turn signal wand, but the wipers do not behave this way when it is not raining. I can use the wipers to clean the windshield and run them on high, normal and intermittent mode and the control works as expected - and when I turn them off, they turn off. It seems to only occur when it is raining. So it seems that moisture is getting into some part of the electrical mechanism that controls the wiper functions from outside and/or in the engine compartment. I've not found any issue of moisture inside the cab at all. Any thoughts? I'd hate to replace the switch assembly on the turn signal wand (expensive) if that ends up not even being related to the issue.... Thanks in advance!