0 – Standard on/off function output 1 – FRED – flashing rear end device 2 – Mars light 3 – Rotary beacon 4 – Gyralight 5 – Double strobe 6 – Single strobe 7 – Dimmed when on, off when off 8 – Dim in forward, bright in reverse 9 – Dim in reverse, bright in forward 10 – Type A Ditch light phase A 11 – Type A Ditch light phase B, 12 – Type B Ditch light phase A 13 – Type B Ditch light phase B 14 – F0 Dimmed when F4 on, bright when F4 off 15 – Output is always off