If I'm not mistaken, it will come on when you turn on your outside heated mirrors. You can see the heat elements in the windshield under the glass at the wiper blades. The outside mirror heater button is right below your windshield defrost button by the a/c dials.
I would've liked to see the look on the customs officer when you tell them casually that your truck is "drinking" the booze.. and spitting it all over its own face (windshield)! :boink:Local trick I learned from the Canucks up in Nisku Alb several years ago,got PO'd one year and filled the jug with 100% before ever crossing into Mt. I was ready
The lady at WalMarts was like ....... to funny.