Hook up your trailer, drive your side-by-sides on, and watch your F-150′s taillights to see how much rear travel you’re taking up. One light equals 25 percent payload. This ingenious visual system acts just like the battery indicator on your favorite hand tool, the cellular bars on your phone, or the fuel gauge inside your UTV. While it’s not precise, it’s vastly better than nothing. You’ll also get a more detailed readout of what the truck’s sensing through the multimedia touchscreen.