Cut sausages diagonally into 1/2-in. slices; cook in a skillet over medium heat until lightly browned. Transfer sausages to a 3-qt. slow cooker; discard drippings.
Add dressings, brown sugar and juice to skillet; cook and stir over medium-low heat until sugar is dissolved. Pour over sausages. Cover and cook on low for 1-2 hours or until heated through. If desired, sprinkle with green onions.
Editor's Note: French salad dressing may be substituted for one or both dressings.