The light is on because there is a problem with the ABS. Have it repaired and they will reset the light. As long as the problem is not repaired the light will just come back on unless the problem is fixed.
You can usually have an autoparts (Autozone, Advance Auto, OReilly) store run a computer diagnostics to tell you the source of the problem. On my car the abs light was caused by the front wheel bearings (these contain sensors necessary for the abs system) I replaced these and the abs light went off. Be sure to find out exactly what the problem is first and correct that.
Check electrical grounds
It could be a fuse , a sensor , or some other problem with the antilock brake system ( as long as the red " brake " light in your dash is not on you still have " normal " braking )
turn the little black knob to the right of the brake light on your dash clockwise
Yes, your tail lights will go out when your dash board lights go out.
Need to know what about the dash board lights.
replacing dash board lights
Where is the Dash board lights fuse of ford mondeo 2002 lx
check your fuses
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replace fuse
No , the rear brake lights do not turn on when you use your parking brake , just the brake light on your dash is supposed to come on
A problem has been detected with the Antilock Brake System It could be a fuse , a sensor , or some other problem As long as the red " BRAKE " light is not on in your dash you still have " normal " brakes ( it's just that the Antilock Brake System feature is not working )