1997 Ford Aerostar Owner's Manual - Page 271

authorized service center can perform a detailed OBD II drive cycle as it would any other type of repair work. Lights and Bulb Replacement It is a good idea to check the operation of the following lights frequently: u headlamps u high-mount brakelamp u tail lamps u brakelamps u hazard flasher u turn signals u license plate lamps The alignment of your headlamps should be checked if: u oncoming motorists frequently signal you to u the headlamps do not seem to give you enough light to see clearly at night turn off your vehicle's high beams when you do not have the high beams on u the headlamp beams are pointed substantially away from a position slightly down and to the right Headlamp Bulb The headlamps on your vehicle use replaceable bulbs. When the lamp burns out, simply replace the bulb, rather than the whole lamp. 272