Chuck,
In my early conversion days, I confused the mars light with the beacon as I didn't use either. Once in a while I'd notice things, like my number boards blinking like a mars light for example. I stumbled across issues with each install and never kept records. None of my more modern diesel installs needed mars lights.
At one point, I'd put the PS2 board set in, load the sound file I liked, and then connected all the extra lights according to what the soft keys controlled. I even remember one sound set, had the softkeys labeled wrong.
