Ford 1996 Windstar Manual page 244

If the anti-lock brake system warning light remains on or
comes on while driving, have the braking system checked
by a qualified service technician as soon as possible.
NOTE: If a fault occurs in the anti-lock system, and the brake
warning light is not lit, the anti-lock system is
disabled but normal brake function remains
operational.
Ford Motor Company has not found any negative effects of
mobile radio transmitting equipment installed on vehicles with
the ABS system providing that the radio is installed according
to the radio manufacturer's instructions. However, if you have
had a mobile radio transmitter installed and the check ABS light
comes on (at any time other than immediately after turning the
key to the ON position) have your mobile radio dealer inspect
the radio installation. Also, if the ABS system is activated other
than during maximum braking, have your mobile radio
installation checked.
If Brakes Do Not Grip Well or Pedal is "Low"
If the brake pedal seems "low" it may indicate the need for a
brake system inspection and/or service. Apply your parking
brake several times. If the condition has not improved, you
should have your brakes checked as soon as possible.
Occasional brake squeal during light to moderate stops does not
affect the function of the brake system and is normal. However,
if the squeal becomes very loud or if it becomes more frequent,
return the vehicle to your dealer for inspection.
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