Yep, got a plenty good idea.
Fundamentally, sitting in front of the battery, is the
actual charger. This is a DC-DC converter (DC in, DC out), whose output voltage and current into the battery is controlled and actually makes electrons flow into the battery.
Now, the
input for the actual charger comes from one of two places:
- A DC voltage from a supercharger.
- A DC voltage from an AC rectifier.
Let's talk about #2. City power at your house or at destination chargers comes in AC; level 1 is 120 VAC, Level 2 is 208/220 VAC. Either of these gets rectified, that is, converted to DC, and then gets sent to the car's charger.
Pretty clear, then: Your actual charger in the car, that DC->DC converter, is working just fine.
The AC->DC rectifier appears to be out to lunch.
Now that we know the general area.. that's cool, but neither you nor I are going to be able to fix
this. There's lots that can go wrong: Loose wires, blown fuses, blown transistors, parts that should be soldered but aren't, parts that shouldn't be soldered together but are, diodes that aren't diodes any more, bad ICs, etc., etc.. (Can you tell I diagnose broken electronics for a living?)
At this point, fire up your app, select Service, Select Battery, Select Charging. Tell them the Evil That Has Befallen you. This is what warranties are for; my experience with Tesla is that they fix stuff like this pretty quickly.
One minor suggestion. I don't feel totally comfortable with the idea. You
might try, with your mobile connector, hooking up to a 120 VAC wall socket, and see if the car will charge with that. But. You've got a failure in the car. This kind of stuff is electrical high power: For sure, it's not a table lamp. If Things Go Wrong, smoke and worse can happen. More likely, before smoke, you'll get a blown fuse, but it does mean additional hardware going that-a-way if something bad happens.
It's kind of like finding a gas leak on an ICE car. Yes, you can drive it around. Um. Do you really want to do that? In fact, if I were you, driving that car right now, until this gets fixed, might be something one might want to think twice about.