car shut off ever time i cut my ac,heater,defrost on what can cause this to happen???

 

First thing check the battery for a full charge and have it load tested. Then while you are at the place that is load testing the battery have them use their diagnostic scanner and see what engine codes you may have either stored or pending which is 2 different are's. You can also look at the emission monitors to see if they are all in state of readiness or GREEN for good.