RepairPal Certified shops can diagnose and repair your 2007 Kia Sorento. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Could be a headlight switch, hazard switch or a ground problem. Not sure what circuit your tail lights are on but you will need a wiring schematic to trace down the power and ground circuits to determine if it is a component or a wiring problem.. Best of luck, these things can become a nightmare..
Chuck