remote start problem

I have a 2004 chevrolet silverado ans I just installed a ca-610 code alarm on it. after I auto start my truck and I stop it with my remote the dash lights stay on until I hit the unlock button on the transmitter, then they go off.

there is another wire on my alarm brain to shut the accesories off after the vehicle remote start is shut down, I just dont know what to hook it to. the guy at code alarm said it has to do with the option on cars that keeps the accessories on after you turn the ignition off (like your car stereo). he said I could possibly hook it to the door ajar wire, but I dont know where that is. I'm sure someone here has ran into the same problem and knows what I can do.

thanks for all your help

should a5 always have power? Im using b5 as an illuminated entry, I did  hook my extra wire to b5 and it shut off my dash lights. it turns my dome light on but that goes out in like 5 seconds, so that is definately better than waiting for the dash lights to turn off in the 15 or so minutes it takes.

but I am curious to know if the a5 is suppose to have constant power.

my truck didnt have power locks or windows when I got it, and it has rubber floors, so Im safe to assume that its a base model, right?

let me know. thank you all for your help it is greatly appreciated!! 

only other question I have is I need to hook up my tach wire so I can use the feature where when you go to to gas station and want to leave the vehicle running you can press the button for auto start and take the key out of the ignition and it will stay running.

I know its suppose to be a white wire but I havent had any luck finding it, I was also told I could use one of the wires from one of the coils or fuel injectors, hopefully you guys can help me again. thank you for all your help

Look on the back of the instrument cluster...