97 buick regal ignition problem

While changing my 97 buick regal ignition i clipped the black wire the runs from the back of the part were you put in the key. i am pretty sure this was the security wire. When i went to start the car it wont turn over and the security light is now on. i spliced the wire back together and tried the reprogram but no luck. I f anyone has advice it would be appreciated. Thinking about just bypass passkey. Anything would help. The wire was black with two white wires inside.

Just to add talked to a service rep at gm today and he said once wire is cut it cannot be spliced back together the computer will never rea the key again and the key lock cylinder needs to be replaced. Does anyone have any idea if his is correct? i need help badly any info is app

I question his methods. Unless it is fiber optic then you should be able to splice it back together. Just make sure that you make a solid connection using soldier and then wrap it with tape or shrink wrap to keep it from grounding out. This may be a ploy to sell you a lock cylinder. I would try the splice first and if it doesn't work then do the new cylinder.

When I changed the ign switch on our 98 Regal that wire was cut. No warning light and it starts fine. But we had a remote start installed several years ago, I don't know if they bypassed it somehow or not. I couldn't find the other end under the dash.