While you wait for answers, we may have found some information which could help you.
Click here for Citroen Berlingo Van
Battery drain (or alternator or electrics?) on Citroen Berlingo 2008?
Wiring to relay between fuse and starter motor?
does the berlingo bend valves when the timing belt snaps?
Citroen dispatch rear door lock issue?
Citreon berlingo 1.9 diesal ?
No accessory mode electrics unless engine running?