Going by what you said " My Corsa indicator is suddenly very quiet since Vauxhall played around with the settings. " . they are talking rubbish , they changed it .
It is usually configured through the settings menu , vehicle settings , personalisation , comfort , convenience settings or under different name . All I can find on your car is this om page 106 onwards
https://www.vauxhall.co.uk/content/dam/vauxhall/Home/PDFs/owners/owners-manuals/corsa/om_corsa_kta-2764-vx-en_eu_my15_ed0914_7_en_vx_online.pdf
It can be done and obviously was on your car when they were messing about with the settings .Don't take no for an answer as they introduced the change . On some earlier models there was a secret menu for settings you could enter for adjusting it but doesn't apply to your year and I dont know if and how to access it on your car . It CAN be done and was on your car by them , possibly accidently or unknowingly by them .
Posted Aug 9, 2024 (1 month ago)
Edited on Aug 9, 2024 (1 month ago)