Ford Motor Co., Coca-Cola and Cingular Wireless are returning as the sponsors of “American Idol,” Fox said Friday. Contestants will be shown riding in Ford vehicles, and the winner and runner-up in the competition will be awarded new Ford Fusions. Coke will be featured in interstitials on the show and the company will air a special “Idol”-themed commercial. Cingular customers will be able to use their phones to vote for contestants. They will receive trivia, fan club news, chat and interactive games via their phones. Cingular also plans to launch an “Idol”-themed sweepstakes later in the season.