Checking bulbs
With all doors closed, apply the parking brake and place the ignition switch in the ON position without starting the engine. The following lights will come on:

If equipped, the following lights come on briefly and then go off:

If any light fails to come on, it may indicate a burned-out bulb or an open circuit in the electrical system. Have the system repaired promptly.
See also:
Trailer lights
When splicing into the vehicle electrical
system, a commercially available powertype
module/converter must be used to
provide power for all trailer lighting. This
unit uses the vehicle bat ...
Interior lights
Do not use for extended periods of time
with the engine stopped. This could
result in a discharged battery. ...
Checking seat belt operation
Seat belt retractors are designed to lock seat belt
movement by two separate methods:
● When the seat belt is pulled quickly from the
retractor.
● When the vehicle slows down rapidly.
...
