Altitude compensator on turbo phazer

hey i have a 2007 phazer mountain lite and i put a new boost gauge on and thought id wire the light for it into the two wires that go back to the altitude compensator before i hooked it up i checked to make sure the wires had voltage what they did but when i hooked the light up and started the sled it didnt come on and there was no voltage and i havent had any since i chased the wires all the way back to the mc express computer and there was no fuse anywhere so i was wondering if maybe i fried something in the computer it seems to not put out as much boost as it used to it used to hit 14-16 now only 10-12 so any info anyone has would be appreciated.

ya i have made my own power off the battery but not i am not sure if my altitude compensator or waste gate controller or what ever it is doesnt have 12v power anymore and before i connected that light there was power there according to my volt meter. anyways any ideas?? is there suppose to be power all the time or only when it is adjusting??