1997 Ford Aerostar Owner's Manual - Page 13

Rear Anti-Lock (ABS) Brake Warning Light To check the rear ABS brake warning light, turn the ignition key to the ON position. The rear ABS brake warning light should glow momentarily. NOTE: If it does not glow momentarily, have your vehicle's electrical system checked immediately. NOTE: If the rear ABS brake warning light begins to flash in a repeating flash sequence, check the rear anti-lock brake system continuous power fuse and brake lights for proper operation. Rear anti-lock warning light symbol RWARNING 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. 10