Sounds like you’ve run into one of the most common issues with Ford Rangers made in the late 1990s—a dome light that won’t shut off! While this problem can be a major nuisance (especially if it drains your battery) it’s usually easy to fix.
However, if you’ve used lubricant on your doors and the dome light still doesn’t turn off, you might have rusted or corroded hinge pins. You can try replacing these parts yourself if you’re handy—hinge pins can be found at most auto parts or hardware stores—or simply bring your car to your trusted auto mechanic for repairs.