Does the anti-lock brake lamp light up when the system is active???? The Ford handbook is not specific. It only addresses system malfunctions. I'd like to know, as I have attempted to brake in very slick conditions and have not noticed any anti-lock anything.
I have never seen any notification for ABS in the dash WHILE it is 'on.' I have felt it working through the pedal, of course; but never any ABS light notification. I have seen the traction control light come on repeatedly in slippery conditions (or when I forget to turn it off!)
if the brake pedal vibrates as you brake very hard, the ABS is working fine. i dont know about the light, sorry.