Welcome to the site!!! 5 minutes?? Mine stays on for 10 minutes after I turn the truck off or remove the key. Unfortunately that's the way Ford programmed the truck to save the battery. You can bypass that by re-wiring the power cable to the battery but it's not a very easy job.
2007 Ford F150 Supercrew sold
2010 fully loaded Ford Fusion
2002 Mustang GT being built in garage.....stay tuned!!!!