What causes the battery light to come on while driving? on 1998 Ford Contour

It was only happening every once in awhile but now is alot more frequently. It makes no different if the radio or heater is on, the light still comes on and off.

by in Percy, IL on November 02, 2012
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2 answers 1 comment
ANSWER by , November 02, 2012
faulty alternator
COMMENT by , November 02, 2012
I agree with both #1and2
ANSWER by , November 02, 2012
ALTERNATOR IS STARTING TO GIVE OUT IS MY GUESS.