Vauxhall Corsa Owner's Manual page 246

242 Self-help, vehicle care
5. Gently press the three locking lugs on the
outside of the bulb holder outwards and
remove bulb holder.
Bulbs in bulb carrier:
1 = Reversing light (left side),
fog tail light (right side)
2 = Tail light
3 = Turn signal light
4 = Tail light/brake light
5 = Tail light
6. Remove bulb from holder, gently
pressing the bulb and rotating it.
7. Insert new bulbs, pressing bulb gently
and rotating it. Do not touch the glass.
8. Engage bulb holder in bulb housing,
ensuring that it properly engages.