OK, as much as I think power windows are an un-needed (and sometimes un-wanted) option I have them, and they don't work. I replaced my ignition switch a bit ago and have since then lost my windows and heater. I can jump the wires at the switch and get the windows to work regulary again. Every other function works perfectly on my new ignition switch so I don't want to believe that it is broken, but???? Any ideas?

 

https://www.dieseltruckresource.com/...=power+windows

I'm not sure the correct method of posting a link, but here it is. This helped me immensely, especially the how-to on the second page about installing a relay. I hope it helps!