[Pursya]

Unfortunately I’m not a mechanic or auto electrician.
If there’s a switch fault then it probably occurs under vibration.
I suppose you could temporarily join the wires coming from the switch to make the lights “always off (or On depending on what the switch does)” Then test drive.
Though this needs to be done with extreme caution as only the steering wheel switch will disengage the cruise.
Extreme caution if you try this.

Before that, see I the switch is locating against the pedal correctly. Maybe it’s out of position.