A day later the same problem came up again so not
a bad connection after all but presumably some fault in the alternator.
In the end I found out that to get the starter motor
running I had to disconnect the alternator.
But at this moment the engine is running badly; it’s
like it’s running on four cylinders instead of eight.
I guess I’ve been playing too much with the lights and
the starter motor so I measured the voltage at
the battery and it’s only 10 Volts; a bit to low.
This is probably why I don’t hear the fuel pump running
and probably the engine is running on almost empty carburettors.
So I took out the alternator and I will have it checked
at a local car electricity shop.
I made some pictures when the car was in the garden;
the body still has to be polished but this will be done
when all the technical issues are solved.
The same goes for the bumpers; they will be mounted
when the car has received her definite greasy rust protection
and when the end silencers are adapted to two twin pipes.