03 gmc sierra remote start

the orange wire is getting power during the remote start as a matter of fact it getting power about 3 to 4 seconds before the remote start engages. it just seems as though that im missing something somewhere and im not sure where. ive checked the hood pin wire thats not the problem. because when i hook all the wires exactly as i should it will sometimes try to engage the gages on the dash but it will only engage them for just a moment and then the alarm will prompt me saying that the remote start has turned off. but if i unhook the white wire then it will try to start but wont. the bypass is doing its job but it want start because there's no power getting to the dash somehow or another. ive owned this shop for about 11 yrs and ive never had this problem on a job thats so simple before. i normaly have my biggest problems out of the bypasses not the remote start. thanks for your response because i worked on this alarm for about 9 hrs yesterday and 8 of those hrs was spent working on this problem. sometimes its just good to hear from someone else that has been there and done that. thanks. if you have anymore suggestions please let me know

Two ideas- Is your second ignition truly an ignition hot---ie;  is hot during "run" and "crank"  - it may be set to accessory hot- or starter hot

and- have you tried a new "brain" box- I have seen them come from the factory with poor contacts on the internal relays- will show 12v - but not "pull" 12v with enough amps to energize the ignition wire.