Why would I lose my heat, rear wipers, rear defrost, and A/C all at once. on 2000 Chrysler Voyager

I checked fuses and switched out some relays, but no luck. The blower still works. The light on all those buttons (on the dash) don't come on anymore. Anyone have any ideas?

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2 answers
The system you have that are not working are controled by a body control module. Need to have someone that has capbilty to check for fault codes in he body module and go from there. I have seen instances when the system requires a self recalibration procedure done to get working again.
scan bcm for codes and communication