My security light on my car wont start what to do

You did not say if the car will start or not. Assuming you have a no start condition along with a security lamp, the problem typically requires the replacement of the ignition lock cylinder and keys. If you have another ignition key you want to try it first.

poss bad key module. agree with #1

my 96 chevy lumina will not start iturn switch and nothing happen I short the starter the engine turns but will not start