Once you get done with all the visual tests, it is time for the test drive. The Jeep should be cold when you get there. If it isn’t, come back later. You want to keep an eye on the tailpipe for smoke at a cold startup. Blue smoke can indicate burning oil, white can mean its burning water, and sometimes a carbureted rig will puff a bit of unburned fuel. Once it is fired up, take it for a drive. Pay attention to how it runs as it comes up to temperature. Play with everything and note what doesn’t work. Put it in 4-Hi and 4-Lo and drive it. While driving it pay attention to how it shifts, steers, and stops. Try the wipers, horn, and stereo (if equipped). Test the lights and walk around the Jeep to see they are actually working.