My Durango won't crank but I have a good Battery and everything is working

Check starter relay in the fuse / relay box in the engine compartment .Do you know what a starter relay is ? Go on youtube an look at video on testing . Engine Won Start No Crank Diagnosis Troubleshooting Starting System Issues

IF you can get to a scan tool, you should hook it up and see what it says.

The moisture in the air is an obvious indication of a poor electrical connection/contact. You must inspect the ignition cap and rotor and replace if excessively worn.

check all wires to starter motor for bad earth.....make sure power reaching starter motor.....check starter motor isnt stuck

At www.reliable-store.com get complete guide on whether to repair or not,
service it, and how to repair etc, along with wiring diagrams, electrical diagrams, torque specs, error codes, everything.

Check that the crank shaft position senser is plugged in and working and not broken this will cause your comp to not send fire to you coil and it won't fire hope this helps you

What happens when you attempt to start the engine? If nothing happens when you turn the key,you need to check the battery to determine its state of charge. Many starters won't do a thing unless there is at least 10 volts available from the battery. A low battery does not necessarily mean the battery is the problem, though. The battery may have been run down by prolonged cranking while trying to start the engine. Or, the battery's low state of charge may be the result of a charging system problem. Either way, the battery needs to be recharged and tested. If the battery is low, the next logical step might be to try starting the engine with another battery or a charger. If the engine cranks normally and roars to life, you can assume the problem was a dead battery, or a charging problem that allowed the battery to run down. If the battery accepts a charge and tests okay, checking the output of the charging system should help you identify any problems there.

Is the ground for the engine and the battery clean and working properly check at point of connection with test light to see if all grounds are OK and make sure no positive cable are bare and touching metal causing a ground fault and blowing fuse . check wires at battery and going to starter some times wires will burn through and touch other wires or metal causing a direct ground. good luck

Most possible is your cam or crank sensor. Check foro signal and sync between them. I would start with the crank sensor first