There is a bundle of wiring that goes into the steering wheel, carefully open the wiring wrap to expose the wires. You are looking for one wire that is white with orange stripe. There are three of these white with orange stripe in the bundle. You'll know if you tapped into the wrong one because the AC will not work. If parasitic battery drain occurs, then the wire tapped to is battery fed power, not ignition, so you'll have to tap it to a different white wire with an orange stripe
