Hi there, I have just spoken to an elderly friend who has had problems with her car. (Mazda 323 1999/2000)
While driving the brake anti-lock system light came on and when braking it made a strange noise (she said). She stopped turned of the ignition waited 10 mins then turned on the ignition, the anti-lock system warning light was out so she drove on, but, the minute she touched the brakes it came on again....

Where do I need to start looking

Many thanks in advance