Berlingo DW8 Speedo

[Aneirinh]

Hi Folks!
Anybody know if the electronic speedo circuit on the berlingo is linked to the engine loom in anyway?
The reason I'm asking is a mate of mine has just put an xud into a van that had a DW8 and the speedo no longer works, the box is still the original with the same sender in it and all the wiring seems ok.
Any help would be great...