1. Battery: Check the battery to make sure it is fully charged and making good contact with the terminals. Clean the battery terminals if necessary.
2. Starter: The starter may be faulty or not receiving power. Check the wiring to the starter and make sure the solenoid is working properly.
3. Ignition switch: The ignition switch may be faulty or not making good contact. Check the wiring to the ignition switch and make sure the switch is working properly.
4. Neutral safety switch: The neutral safety switch prevents the engine from starting if the transmission is not in neutral or park. Check the wiring to the neutral safety switch and make sure the switch is working properly.
5. Engine control unit (ECU): The ECU is responsible for controlling the engine's operation. If the ECU is faulty, it may not be sending the correct signals to the starter or fuel injector. Have the ECU scanned for trouble codes to see if there are any problems.
