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I just entered Service mode at home. Maybe it's different depending on country.

That´s a bit unclear... I did manage to get it into Drive one time with another 12v-battery and charger. At the moment I´m leaning towards bad ground-connection. I don´t remember where I put the starter cables when I was able to put it into Drive, but I do remember that I had them both directly...

Thank you for the tip (found your thread)! I found out that I can enter Service Mode at home, so it should work.

I could only find 1 fuse in the DC/DC converter, but 4 (AirCon, PTC, BatHeat, DC/DC) in the junction block/distribution module. I don´t have the converter located in the wheel arch. I found a picture (not mine) of how it looks in my car. The left arrow points at the junction block with 4 fuses...

Great! Thank you, I will do that. Yes, I know it's dangerous. And thank you for caring although you don't know me :)

I opened the converter yesterday, and found a fuse! Sadly, it was ok. As I see it, I have two options: 1. Pay big money and let Tesla fix my problem (no 13,5v out of the converter). 2. Buy a used converter and try.

Isn't it the 1:st generation converter that have fuses in it? This one has fuses in the junction box right next to it, and those fuses are fine. But no one would be happier than me if I am wrong :)

Thanks for your reply! Yes, I have spend a considerable amount of hours on YouTube at this point 😂 I forgot to mention that this is the 2:nd generation DC/DC converter. I have checked the fuses in the front junction block and they're all ok.

I bought a 2014 Model S that have done 270000km (Yes, I live in Sweden so we talk km ;)) Long story short: I believe my DC/DC converter is broken (does not charge the 12v battery, I have 386v from the front junction block). Instead of towing it to Tesla (300km away) and paying them big money to...