Opel INSIGNIA 2017 Owner's Manual page 254

252 Vehicle care
4. Turn the turn signal light bulb
socket anticlockwise and remove
it from the light assembly.
5. Remove and replace the turn
signal light bulb.
6. Attach the bulb socket to the light
assembly.
7. Attach the light assembly to the
vehicle body and tighten the
securing nuts from the inside of
the load compartment. Attach
cover.
Light assembly in the tailgate
1. Release the cover in the tailgate
and remove it.
2. Unscrew the plastic securing nut
by hand.