Cant quite figure what you are trying to ask here, But I have a master switch on all my vehicles. And when I require the vehicle to fire up I simply turn on the master (isolator switch) Then fire up and go. The only delay is if I have to walk round to turn the master on if it is on the battery side (passenger side) on some trucks. When the switch is reachable in the cab, it's turn on. ignition on. crank, warm up, go.