That's a good start , reading up on the BCM ,but also looking at wiring diagrams an learning how to test electrical circuit's using a DVOM - digital volt ohm meter are need to diagnose these type problem's . Looking at a wiring diagram to see if the BCM even has anything to do with that system or circuit's . Most people on here just jump in an start replacing thing's they have no clue how they work or why. And if you have no clue about automotive electrical testing you really should learn how before even jumping into something like this . An just replace a BCM without it being programmed correctly could make thing's worst .
Plus you need to be aware of other control modules on the vehicle , like on your vehicle ! It has control modules inside the doors , DDM - driver door module , PDM - passenger door module's etc.... The door modules control the power windows an lock's .Plus you need to be aware of that all this modules share info. an send commands to other modules via a serial data network . Your vehicle has the chrysler CCD data bus .
A broken wire inside the flex boot from the body A pillar to the dirver door could cause power lock's an window problems , but would not affect the other problems you are having .
Electric Testing Techniques You Need to Know
Free wiring diagram's here
http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model an engine size. Under system click on body & accessories ,then under subsystem click on power window's or lock's an you will see the door modules .Plus the BCM has nothing to do with the A/C not working , A/C compressor does not engage or is it the blower motor isn't working ? no air blowing out the vent's ? Your best bet ,take your vehicle to a qualified repair shop .Takes year's to learn how to diagnose these type problems .
CCD Chrysler Collision Detection Data Bus