I have another converter.And i put the new converter in circuit.But the same problem.
And now i think about Truck _ dr user said.Yo check the fans...
Ok.i take away the 1f4 fuse The fuse supply the fans.An from this moment , no problem apears.
I find 3 fans and i unplug one by one to see...
Where is 4 fan.From cooling the drive motors ?
I don' t see another (4 ) fan...
I think when is a little hot the fans want to start and something happens..a short..something.
Now with fuse 1f4 unpluged , thè truck is working good.