Keyless/Security Module... how do I know if it is bad?

[Viet_Vet]

A few weeks ago I posted this:

http://www.subaru-svx.net/forum/showthread.php?t=34948

Alas, I still cannot get the system into programming mode, nor can I get the alarm to work or the remotes to unlock the car.

Before I go out and buy a new keyless/security trunk module, I would like to know if there is a way I can make sure that the module is what is broken.

Any ideas?

Thanks!