i have a m715 that was a fire truck , im trying to find the mian power wire thaat goes to the light switch , i have looked at the wiring diagram and it has been helpful with some things but im not good at reading them , so im looking for where the aux. connectoin (85) is that look like it go to the light swicth (15)and to the horn but i dont have one it was in the glove box lol , who ever wired up the head lights used a power wire from battiers to a toggle and spliced in to the wiring harness to the headlights so im hoping they just disconncted the mian power to the switch