Rear Brake Disconnected?

[joeyshakespeare]

Hi all, if you've seen any of my posts recently you'll know I had a minor accident and am trying to get my bike put back together.
I though I had everything working but went for my first ride yesterday to discover that my rear brake is not working.
The actual lever moves freely so I think it is disconnected, instead of shot brake pads etc.
What should I do to test and what is there that can be disconnected?
Thanks!

[adidasguy]

Open your shop manual and look at the rear brake.

Possibly no brake fluid? Disconnected from the master cylinder? Damaged master cylinder?
There's not much to a rear brake: pedal makes an arm move that pushes in on the master cylinder.