I have a '03 VW Jetta GLS 2.0L. I changed the alternator and battery. The car does not start. What's next?

If it doesn't turn over, the obvious %26quot;what's next%26quot; is the starter.
I have a '03 VW Jetta GLS 2.0L. I changed the alternator and battery. The car does not start. What's next?
ignition switch/module
I have a '03 VW Jetta GLS 2.0L. I changed the alternator and battery. The car does not start. What's next?
make sure the fan belt is connected properly.
gasoline pump/filter
First of all does it crank over

put a key lock

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