Master ignition positive interruption

Sounds like what happened with my Master. Did you check the starter solenoid or the ignition switch? That's where I'd start.

Could you tell me exactly which connections or spots you checked on the starter solenoid and ignition switch when you were troubleshooting?

In my case, it was a corroded connector in the wiring harness going to the ignition switch. A workshop fixed it. If you're not sure, I'd suggest taking it to a workshop.

Thanks, I found a bad connection like you said. Cost 95€ to fix the interrupted ignition positive. Your help was spot on.