If you stand at the front of the van facing the radiator you will notice a large black cover that is screwed down with about 8 torx screws to the right of the Battery compartment. Inside this cover is where you will find the yellow (double-box) indicator relay. Firstly you must remove carefully the windscreen trim then disconnect and remove the Battery, then unscrew and remove the black cover so that you can remove the relay.
Mr Critical of Vauxhall, May 2010