Hi Boris,

It's all part of the hazard button you press.

Check fuses 27 & 13 first.

Search for a Volvo wiring diagram for V70's: TP3943202
This is your best friend for troubleshooting wiring issues.

Provide your e-mail and I'll send you a link that was good
April 2023 for the V70 manual. I don't want to publish the link here
and help Google and/or other internet thugs make it disappear.

Good luck, Bill

Turn signal and hazard relays are integrated into the hazard switch. you're going to need to replace both switches. You'll probably find the headlamp switch comes apart in three pieces. some people have to repair the light switch by careful cleaning of the contacts and lubrcaiting the moving parts, then glue the switch housing together. some have reoaired the turn signal flasher by caeful disassembly and cleaning of the switch remove hazard switch, either by gently prying with a plastic trim tool, or you can slip the radio out. DONT unplug the radio unlless you have the code. reach into the radio hole and grasp it and pull it toward you.