While you wait for answers, we may have found some information which could help you.
Click here for Van Citreon Berlingo
citreon dispatch wont start?
No accessory mode electrics unless engine running?
Wiring to relay between fuse and starter motor?
Braking fault?
does the berlingo bend valves when the timing belt snaps?
Battery drain (or alternator or electrics?) on Citroen Berlingo 2008?
howtomendit.com for free repair help, information and advice.
