Force Excerpt on Category in Genesis Child Themes

Add the following code to your WordPress theme’s function.php file, or a functionality plugin to to force Excerpts on Category

add_action( 'genesis_before_loop', 'name_force_excerpt' );

function name_force_excerpt() {

  if (is_category(array(#)) ) {
		remove_action( 'genesis_entry_content', 'genesis_do_post_content' );
		add_action( 'genesis_entry_content', 'media_do_post_content' );
	}
}

function media_do_post_content() {
	the_excerpt();
}