2000 Oldmobile Alero Remote start intermittant

I am installing a customer provided DesignTech remote start on a 2000 Oldmobile Alero.  I have installed a Passlock II bypass module.  The remote starter is working intermittantly.  When it fails to start, the fuel pump is not engaging as if the Passlock bypass is not working, but the security light is not blinking.  I do not think that this is a temperature related resistance problem, because it will work, and one minute later it will fail.  I did not have a problem obtaining the resistance value and I do have experience working with these systems.

I did notice that the information regarding the Accessory wire color provided here at the12volt.com (great site) differs from the color provided at designtech's site.  Here it's listed as brown, and there it's listed as orange.  I stripped and tested the orange wire and it functioned like an accessory wire should, so I used it, though there was also a brown wire.  I ignored the brown wire since I am accustomed to GM using orange for accessory.

Is there a secondary accessory wire that needs to be powered up?  I tested the function of the Ign 1 and Ign 2 wires, and all seems well.  If there is a problem with the wiring, or a secondary wire that I am not powering, why would it work sometimes?  Any suggestions would be greatly appreciated.

I've had the same problem B-4 In that same car. (Which is a pain in the ass since you have to remove the radio to get to the main remote start wires). Put the Pass lock 2 interface as far as the radio location as possible.

and yes the brown wire is the correct acc wire.

you need to use the orange and not the brown you do not need the brown for that vehicle to run

also what bypass module are you using?

2 things i would;

adjust the potentiometer a hair higher with the cold weather the resistance will vary slightly

also cut the green loop on the remote starter unit it may be next to the power wires in unit or inside the box depending on the model you are using it may be sencing an in gear problem so cut the green loop to elimanate

if the vehicle starts up then the unit shuts completely off and does not try to start vehicle again it is with the remote starter and not the bypass cut green loop

if that does not work do as jrilla stated above and check the code it out puts (codes vary depending on unit if not sure list the model of the unit)

Thanks for all the input.  Believe me, I tried utilizing all the troubleshooting codes and testing everything possible in the diagnoses of this problem.  It turned out to be a bad relay in the Autocommand unit.  Though the jumper was set to energize Ignition 2 during On and Start, it was not energizing it during start.  The unit was working intermittantly when there was enough fuel pressure in the lines to start the car long enough, and then catch when Ignition 2 finally did activate.

Unfortunately, this unit was supplied by the customer, and purchased a while back.  In order to save myself some work, I just installed an external relay off of Ignition 1 for proper activation of Ignition 2.  Live and learn I guess.  Again, thanks for all the input!