Mirage 2012, 60K KMs driven. High beams came on randomly during the day and are not shutting off. No modifications done to the headlights/bulb etc.

It is not responding to the high beam switch or removing the bus from under the steering wheel (removing the bus switches off parking lights and other functions though). I unplugged the headlight connector to prevent battery from dying. Is this something I can diagnose/fix on my own?

Other symptoms:
1. The dashboard has the high beam sign on
2. Auto Stop & Go feature is not functioning properly (it lights up on engine start as normal, but turns off after car goes into drive)

All other electronics are normal: android screen, dashboard lights, digital ac, odometer and its functionality, turn signals, beeping sounds on lock/unlock, beeping alerts on lights left on/doors open etc.