If the front end is wiggling during braking, it normally is warped rotors. If the ABS light is on, it may be something else. Maybe one of your calipers is sticking? Have you checked the pads too see if maybe one side is thinner than the other?
It's a good idea to flush the brake fluid every 2-3 years. Brake fluid has the tendencey to absorb moisture from the air. Too much moisture in the brake fluid will cause your brakes to feel "mushy" and this can be very, very dangerous.