1. Battery: Check the battery terminals to make sure they are clean and free of corrosion. Make sure the battery is securely fastened in place. Try jump-starting the car to see if the battery is the issue.
2. Starter: The starter is responsible for turning the engine over. If there is no clicking sound when you turn the key, it could be an issue with the starter. Try tapping the starter with a hammer or metal object to see if it loosens up. If this doesn't work, you may need to replace the starter.
3. Ignition switch: The ignition switch is responsible for sending power to the starter. If there is no power going to the starter, it could be an issue with the ignition switch. Try jiggling the key in the ignition to see if it makes a difference. If not, you may need to replace the ignition switch.
4. Wiring: There may be a wiring issue preventing power from getting to the starter or the ignition switch. Check the wiring for loose connections or damage.
5. Bad ground connection: A bad ground connection can also prevent the starter from getting power. Check the ground cable for loose or corroded connections.
If you are still having trouble starting your 1996 Dodge Caravan, it is best to take it to a qualified mechanic for diagnosis and repair.