I have a 90 Bronco, 5.0, and am having either motor issues or wiring issues for the driver's side window and the tailgate window. Besides this, I also do not have back-up lights. I am wondering if the tailgate window and light problems may be related and if anyone can give me an idea of a place I should be looking to test if I find it's not the window motor. I'd like to make this a one day project, so any heads up I can get would be great. Thanks.