Rinse chicken well; pat dry. Place in a greased 5-6 quart slow cooker skin side up.
In a mixing bowl, stir together the relish, mustard, and mayonnaise. When well blended, stir in the chicken broth. Mix well.
Pour sauce over the chicken.
Cover and cook on low for 6-7 hours, or until chicken is tender, but not dry or mushy.