Citroen Relay 2008 Horsebox

[Wynb]

On my say so my wife and fellow rider have bought a 2008 Relay 3.5T horsebox. It comes with some wiring issues - the central locking does not work from the key, fob or internal switch plus the warning lights on the right side of the dash are very dim. Possibly they are related but what is the best way to get hold of wiring diagrams? I used the Peugeot site a decade or more ago for our old 807 but does the equivalent Citroen site work or is it all via Alldata these days?
Many thanks!

[ozvtr]

It comes with some wiring issues - the central locking does not work from the key, fob or internal switch

This is typically a faulty relay in the BSI (the fusebox in the glovebox). The best way is to get the BSI repaired NOT replaced. Replacing the BSI is an absolute pain!

the warning lights on the right side of the dash are very dim.

If it's inside the instrument cluster you won't get a wiring diagram for that. Again, like the BSI, the cluster will need to be repaired or replaced.