Lewis from the Bronx, Clint and Anna from Minneapolis, and Herb from rural Kentucky have two things in common: Each is young, and each has struggled with illiteracy.

Now, with the help of a new series of public service television announcements, they may well become celebrities, symbols of a new literacy campaign stressing youth problems being jointly launched by ABC television network and the Public Broadcasting System.The yearlong campaign, called YouthPLUS, was first announced in April, and ABC and PBS began broadcasting public service announcements last month.

James Duffy, president of communications of Capital Cities-ABC, says several new 30- and 60-second spots will be shown starting September.

The public service messages, Duffy said, will stress the connection between illiteracy and youth problems, including teenage pregnancy, unemployment, delinquency and substance abuse.