2003 Dodge Caravan Will not start

Start by making sure you have a good and fully charged battery.
 Turn key on and check fuses.
 With key on you should have check engine light on if not suspect bad ignition switch.
 Check starter relay in fuse /relay box under hood mark and switch relays around.
 Unplug BCM wait few minutes and re plug it back and check.
 On the starter you should have power at the big B terminal all the time if not check for short between starter and battery positive terminal.