I bought a used 2012 f250 four wheel drive that had no dome, cargo, or map lights but everything else worked normal. after replacing bulbs, dimmer switch, and checking all fuses i took in to my ford dealership and they found that due to moisture in the cab, it burned out the body control module aka bcm. rumor has it that these trucks leak water from windshield or firewall. i paid 650 to have it replaced.