Vauxhall ASTRA Owner's Manual page 285

284 Self-help, vehicle care
Bulbs in bulb carrier:
1 = Reversing light/brake light
2 = Flasher
3 = Reversing light
4 = Fog tail light (country-specific
version: fog tail light on left side
only. The bulb on the right side
can be used as a spare)
5. Remove bulb from socket.
6. Insert new bulb without touching the
glass. Insert bulb holder in bulb housing
and screw in place. Insert bulb housing
into body and tighten fastening nuts by
hand. Attach plug connector. Close and
lock cover.
7. Carry out the following steps to ensure
proper function of the tail lights:
– Switch on ignition
– Operate brake
– Switch on parking lights
Astra TwinTop
1. Unscrew retaining nuts.