Right Problem

Hey, guys.

after writing some Threats on relatively insignificant things lately, it really caught me!
I got license plates and I wanted to take my fat guy to the Tüv. At first everything was good, I got the "old" battery, which is already a little over over night on the charger charged and the V8 even jumped immediately! Let it run for a quarter of an hour and then go to the Tüv, at the next intersection I notice at once, engine is off. Bunching around, but he ran a little wild and left. Then the battery was empty. Hmm, the "friendly guys" in the blue uniform happened to just come by the wayside and helped me push the cart to the edge of the road as I blocked the whole intersection
Thank God the guy from the trust workshop towed me to the workshop with the tow bar. Once he got there, he found that the battery is dead, what a miracle! first tapped the alternator and measured with a device, V8 ran again with starting aid. The V8 was running like this, then he thinks Lima is ok, good alignment, a little too little tension, but he blamed the dead battery for that. After three minutes, the V8 went out at once. We first pushed him into a parking lot because he just had to get away. That was yesterday, today he calls me, which must be a bigger problem, you put a new battery on it, starter turns but it doesn't start! Did I mention that yesterday when the V8 was still running neither the headlight nor the climate control went/lit?! He tapped on the X relay, but that can't make sure the thickness doesn't start? Does anyone have an idea? I am grateful for every hint


Greetings Rainer