Help needed breaking into a van/central locking question.

[skeggysteve]

I got some parts listed on Ebay, the parts are in the back of a van (52 plate Citroen Relay).
The keys for the van can't be found anywhere.

I've tried the coat hanger down the window trick but failed.

I've taken off the O/S rear light cluster and found the C/L wires. I've checked and neither of the two wires go to earth so I though I'd put 12v across them - nothing happens.

So over to you guys!

I do have a hammer and I keep looking at it with bad thoughts!

[EDLT]

Has it got rear windows you could remove?

[skeggysteve]

No rear windows, but thanks for the reply.