1997 Cavalier w/ Passlock I problem

Hi.  I am in the midst of installing a remote start/security system into my sister-in-law's 1997 Cavalier utilizing the Passlock I theft deterrant system.

I am planning on permanently bypassing the system using a relay and appropriate resistor, however when I attempt to read the resistance between the black bulb test wire and the computer side of the severed yellow ignition cylinder wire, my Fluke DMM fails to read because there is a voltage differential across these two wires.  If I use a cheap meter, I can sometimes read around 1.5M-Ohm resistance, but only if the meter leads are in one polarity.  If I switch the leads, my meter reads overload or out-of-range.  Of course, when the car is started either by remote or with the key, the computer shuts it down after 2 seconds.

Does anyone have any other clever tricks to workaround this problem?  Does anyone know the valid resistance ranges for the Passlock I system?  Is 1.5M-Ohm even valid itself?

At the moment, I have disabled the remote start feature, and reconnected the yellow Passlock wire, and she can still use the remote for keyless entry and alarm.

Is the shut down signal sent along the data bus to the PCM from the IC, or is this a different undocumented circuit that I can modify?

Thanks in advance for your help!

-=Brian=-

hi your should be reading off key side of yellow wire not computer side

Oops, my bad.  I DID in fact attempt to read from the KEY cylinder side of the yellow wire, not the computer side, AND the car is a 1999, not a 1997.  (This is what I get for posting while half asleep...  )

I've read elsewhere on this site that the resistor/relay "fix" is more reliable than the bypass modules...  And in either case, I still need to be able to read the correct value to set the module...

At the moment, she does not have the $$$ to put into the additional module, that is why I am leaning towards the relay & resistor/pot bypass.  We do not worry  much about having the vehicle stolen, mostly because of location, and the fact that it's just a Cavalier...

Anyway, I still need to read the resistance across the bulb test wire and the yellow PL wire at the ignition side...  Is there an order of operations that I'm missing here, or what???