They are all always on. When cranking, a device plugged into most likely won't receive enough power to stay on.

I installed a 1.5 farad capacitor on my 96 and it now will keep a device powered while cranking.

98.5 SVT 91 Escort GT (almost sold) 96 ATX Zetec (i brake to watch you swerve) FS: SVT rear sway bar WTB: Very cheap beater CEG Dragon Run - October 13-15