good solved
the problem is rare, but those who would like to help themselves, here is a little tutorial.
the diodes found in the headlight motors are used to distribute the current for lifting and lowering.
1 operation of a diode:
2 connections
3 diode replacement
the diodes of origin lucas 35 8805 76 are 40 years old and are now very difficult to find, the alternative is diode 1N 4007 1A 1000V which is very easy today
4 renovated engine
cost of operation 20cents x4 for diodes and about two hours for insta llation and welding.
