Why no start after booster cables reversed on 03 Toyota Matrix 1.8?

Reversing booster cables can cause a surge of electricity that damages the vehicle's electrical system, including the battery, fuses, and potentially the alternator or other components. In a 2003 Toyota Matrix, this could lead to blown fuses or damage to the vehicle's computer systems, preventing the car from starting. It's important to check for blown fuses and inspect the battery and electrical connections for damage. If issues persist, a professional diagnostic may be necessary to identify and repair any damage.