Hey Dak. That's awesome.

Rock on!
Camel. Sorry I didn't get back to you sooner. I'd decided I was going to fit the blame on the installers since they've not connected my deck properly and I also had an alarm installed that is now seriously out of whack. I know, I know, my apologies for slamming the audio folk but this work is under warranty and I didn't like the original service I received. They'll get it right or they'll do it again and again..hehe.
I was told that the dimmer wire (when audio guy #2 looked at the car a second time) was not at all connected..perhaps that would help say if one would like to have a dimmer working! Argh. I also don't have reverse lights at the back so perhaps they're on the same circuit? You would know better than I. End result though, is I'm not getting power to the switch, not getting a dimmer on my deck, not getting a siren on my alarm and scaring the bigeezus out of people in parking lots.
Can an improperly connected alarm drain the battery? I've had to buy another as it just couldn't start my car. Please explain as much of the dimmer circuit, or wiring that you can as far as what and where it should be connected to.
Sorry If my writing is a bit disjointed, i'm on break and rushed.
Cheers and thanks for your help. =o)