the previous owner of the screen tried to hook it up to the e brake but had no luck so he had it installed by someone else.the had 2 switches hooked up to it and had to turn one on and toggle the other one 3 or 4 times then turn the other off then the screen would come on,i tried that but no luck i have no clue how to set it up like this.is there an easier way or does anyone have a wiring diagram for this?