Honda 2003 Civic Si Owner's Manual page 201

Lights
Headlight Aiming
The headlights were properly aimed
when your car was new. If you
regularly carry heavy items in the
cargo area, readjustment may be
required. Adjustment of the
headlights should be performed by a
Honda technician or other qualified
mechanic.
202
Maintenance
Replacing a Headlight Bulb
Your car has halogen headlight
bulbs, one on each side. When
replacing a bulb, handle it by its steel
base and protect the glass from
contact with your skin or hard
objects. If you touch the glass, clean
it with denatured alcohol and a clean
cloth.
Halogen headlight bulbs get very hot
when lit. Oil, perspiration, or a scratch
on the glass can cause the bulb to
overheat and shatter.
BULB WEATHER SEAL
HOLD-DOWN WIRE CONNECTOR
1. Open the hood.
2. Remove the electrical connector
from the bulb by pulling the
connector straight back.