i didnt say hook it up to a switch i said just ground the wire to the chassis and flip the micro switch under the n3 you cant see it it is under some foil tape THE SWITCH IS ON THE N3 if you do not want to do that the e brake wire is under the console i had an n3 and did this where i could watch movies going down the road you still have to hook up the speed sense wire and the reverse wire.......