I had this problems in the past.
Just for the info some finds in my task to fix the problem
In 2007 I had problems with the original Paris Rhone.
The diodes had a defect.
If you can find new or revived alternators from Peugeot 309/205/405 div Citroen AX BX 1.4 and (Rover 100 not verified)
then you can swap the front from the Murena.
You have +D for connection with the ghargelight but mis the the other connections that are less relevant (test plug).
Aditional info for +D connection anchorcoil