Ford 1989 Bronco Owner's Manual page 109

WARNING: If the OFF light is illuminated when the passenger
airbag switch is in the ON position and the ignition switch is in
ON, have the passenger airbag switch serviced at an authorized dealer
immediately.
The passenger side airbag should always be ON (the airbag OFF light
should not be illuminated) unless the passenger is a person who meets
the requirements stated either in Category 1, 2 or 3 of the
NHTSA/Transport Canada deactivation criteria which follows.
WARNING: The safety belts for the driver and right front
passenger seating positions have been specifically designed to
function together with the airbags in certain types of crashes. When
you turn OFF your airbag, you not only lose the protection of the
airbag, you also may reduce the effectiveness of your safety belt
system, which was designed to work with the airbag. If you are not a
person who meets the requirements stated in the NHTSA/Transport
Canada deactivation criteria turning OFF the airbag can increase the
risk of serious injury or death in a collision.
WARNING: If your vehicle has rear seats, always transport
children who are 12 and younger in a rear seating position.
Always use safety belts and child restraints properly. DO NOT place a
child in a rear facing infant seat in the front seat unless your vehicle is
equipped with an airbag ON/OFF switch and the passenger airbag is
turned OFF. This is because the back of the infant seat is too close to
the inflating airbag and the risk of a fatal injury to the infant when the
airbag inflates is substantial.
The vast majority of drivers and passengers are much safer with an airbag
than without. To do their job and reduce the risk of life threatening
injuries, airbags must open with great force, and this force can pose a
potentially deadly risk in some situations, particularly when a front seat
occupant is not properly buckled up. The most effective way to reduce the
risk of unnecessary airbag injuries without reducing the overall safety of
the vehicle is to make sure all occupants are properly restrained in the
vehicle, especially in the front seat. This provides the protection of safety
belts and permits the airbags to provide the additional protection they
were designed to provide. If you choose to deactivate your airbag, you are
losing the very significant risk reducing benefits of the airbag and you are
also reducing the effectiveness of the safety belts, because safety belts in
modern vehicles are designed to work as a safety system with the airbags.
2010 Econoline (eco)
Owners Guide, 3rd Printing
USA (fus)
Seating and Safety Restraints
109