Loses poeer wen i turn the key on??? no nothing and its not the batt???

I keep telling people you can't bypass the anti-theft system, you have to fix it. Pass Key 3 is clever, and I remember from our professional auto electronics wizard @Jeff Armer, there are a number of different Pass Key types.

You need an auto electrician, or an auto locksmith / alarm installer with a bi-directional pro grade scan tool computer. You can't fix this yourself and you don't want to be on the highway doing 70 when the engine turns off. Also bypassing stuff with bit of wire gives a real chance of damaging very expensive modules.

What year and type of vehicle is it?

You can't just disconnect the anti-theft system ! . If the modules on the vehicle don't receive a coded response form the anti-theft system the vehicle will not work , no start ! This coded response is send on the class 2 serial data communication bus to the PCM - engine computer , if it doesn't see it the fuel system , fuel injectors won't be turned on ! an in some cases the engine won't even crank over !
I have read of a way to by pass the system ! If you google GM vats an pass key by pass , you will see how to do it . Don't know if this works or not ! Haven't tried it !

Check the wires good, that go to starter. And the starter solenoid. Clean and tighten all starter wires. By by passing, and starting it direct tells me that there has to be a problem, in wires or ignition system. see if you have power to starter by testing the wire. Sounds like no click on start=no power to starter.

What makes you think this is a anti-theft system problem ? Is the security light lit on the insturment cluster ? When you turn the key to start does the starter spin the engine ? Crank no start ! Or when you turn the key to the start position the starter does nothing . No crank no start . A aftermarket remote start won't by pass anti-theft system . Your best bet would be to take to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes . Before you let someone start hacking up wiring circuits .
DTC B2947
DTC B2948
DTC B2957
DTC B2958
DTC B2960
DTC B3031
DTC B3033
DTC P1626
DTC P1630
DTC P1631
DTC P1632

Do you know what DTC'S are , these would point to an area of trouble an to a fix .

You will need to call a locksmith on this.

is this car a 92 el dorado? if it is put the key in the ignition switch and turn it "on" to prestart position.

Cadillac dealer can by pass that anti theft module

Replace ignition lock cylinder and chip key. The wires have broken.

the wire that goes to the ignition to the anti theft device is probably broken if you call a good locksmith they can go in through the steering column and fix it same thing happened to my 95 eldorado apparently cadillac designed the anti theft system to coincide with the ignition and is connected to the ignition with two wires that turn as the key is turned the wires twist and eventually they wear out