Radio fuse blown - but which one?

[Tom Rae]

I am fitting an aftermarket radio and wish I hadn't started but perhaps I am now past the point of no return! I was asked by the supplier to check current on two feed wires and in the process I have inadvertently blown a fuse but which one? My van is a 2009 California SE. The fuse diagrams I have downloaded are for the 2010 model as I could not find an earlier one. The radio fuse I checked is SB 33 and it seems okay but still the unit is dead. Any suggestions welcome. Thanks

Tom