Vauxhall Astra GTC Owner's Manual page 167

166 Vehicle care
Cornering light
1. Rotate the cap anticlockwise and
remove it.
2. Rotate the bulb holder
anticlockwise to disengage.
Withdraw the bulb holder from the
reflector.
3. Disengage the bulb from the plug
connector by pulling.
4. Replace the bulb and connect
bulb holder with the plug
connector.
5. Insert the bulb holder, engaging
the two lugs into the reflector and
rotate clockwise to secure.
6. Fit the cap and rotate clockwise.
Front turn signal
1. Rotate the cap anticlockwise and
remove it.