Q: Car will not start or crank - 2005 Mazda 3

Rodent damaging wiring can sometimes be more extensive than first appears. Previous experience tells me that there can be more than the one wire you found damaged. Wiring throughout the engine compartment should be thoroughly inspected for damage. Not only can additional wiring be damaged, electrical shorts to various electronic components such as the engine control unit, relays, etc could have occurred when wires are damaged by rodents even though the vehicle was not on or running. Electronic components in modern vehicles are very sensitive to voltage spikes, shorts, battery terminals being crossed, etc. Have a certified technician diagnose your no start situation and inform the tech of the rodent damage you’ve already found.