Ford expedition wont turn over while trying to jump

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Uh-oh! No one likes a squealing Ford! The squealing sound suggests a possible problem with the serpentine belt, which may have broken and could prevent the engine from turning over. Peek under the hood nad make sure the belt is still there. Alternatively, it could indicate a problem with the alternator not charging the battery, leading to a drained battery. It may be that the alternator pulley is locked up. Check the serpentine belt for damage and ensure clean and secure battery connections. If unsure, it's advisable to have a mechanic inspect the vehicle to diagnose and fix the issue correctly. If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!