Hey I have been having problems with my 05 Blazer with the passlock security light coming on while driving! When this happens my automatic lights, rear hatch and dome light stop working! It used to be every couple of weeks it would happen but now its every drive! most the time it does not affect the starting but sometimes it will! I am thinking it may be the ignition switch due to the other ignition controlled accessories not working, Any help or even wiring diagrams would be much appreciated! Thanks