How do you know the ignition switch is adjusted right in 2000 olds intriigue

the ignition switch as in the key and tumbler will only go in one way.. If you are referring about the electronic switch on the coloumn there are adjustment slots in this part.

is there an adjustment if the switch is in the dash? He has changed this now the heater, ac, crusise control dont work

does the signals dash lights work will the car start if this stuff works then i would check for nlown fuses.there is no adjustment for this switch that i am aware of.