My battery light first came up sometime last year, it would come up for a minute and go back off. Took it to the garage and I was told everything seems fine and they can't see anything wrong with either the alternator or the battery. Fast forward, few months later I was embarking on a 2hr drive home and 20 minutes into journey while on the motorway, my engine shuts off in motion and battery light and check engine light came up.
I was able to quickly get to the hard shoulder to try find out what was wrong. I tried to start the engine again but it immediately shuts off. After realising my aircon, cooling seats, radio was on, I turned everything off waited for about 1 minute and push the start button again, Everything seems fine but the moment I turned on the aircon, engine shuts again.
I turned the aircon off, turned on the ignition again, everything was fine and I was able to complete my journey without the journey with aircon and radio off.
Took the car to the Mechanics the next day, they diagnosed the car and I was advised to buy a new battery first and see if the problem persist. Got a new battery next day and everytime I tried to switch on the aircon, engine shuts off. When I turn on just the heating, it's fine but the moment I try to switch to aircon same thing happens. So I decided since its not summer, I don't really need the AC, I'm just gonna stick to heating for now. Drove it around for few days, then yesterday I noticed everytime I come to a stop by the traffic light, battery light comes on quickly and flashes then goes off when in motion. Someone said maybe it could be the alternator connector. What do you guys think?