[KimMG]

Make sure all connections at the starter are clean and secure.
Make sure the ground cable connections from battery are clean and secure to the body.
Check your alternator belt.
Check the electrical connections to your alternator.
Is the red ignition light staying on while you are driving?
Check the starter relay.
Can you push start your car?
Using a wiring diagram to help trace the wires, check your ignition switch. Making sure power is going to the starting circuit.
The Bentley repair manual has the best wiring diagram for your car.