I have a 96 k2500 4x4 5 speed...the weird thing is that when i turn on low beams or left turn signal the windshield wipers come on....what could this be bad switch or ground problem...there is no ground wire going from the frame to the firewall please help thanks

 

I had a similar problem but with my horn and a light whenever I would honk the light would come on, anyways I ended up just taking the steering wheel apart and taking a loose piece of broken plastic out and putting a new fuse in and the problem went away. I realize your issue isn't the same as mine but I would look into the arm coming out of the steering wheel that controls both of the things that are failing you and see if anything is broken of noticeably not how it's supposed to be.