security light flashing how to fix

I thought I needed a new Ignition switch so I ordered one when I got it I went to install it and I needed a specal socket to install it, I already had the trim covers off of the column and unpluged the ign sw. So I just put the plugs back in and it worked fine so I drove it for a week with no more problems so I put it back together and it has been fine!!! So I guess it was just some corrosion in the plugs?

2001 Chevy Astro Van wouldn't start, security light flashing, watched the videos read the fixes, bought a new B102 key, problem solved.

I got 2003 Chevy Astro cargo van car running but the security , and check gate. The battery picture came on after minnute engine cut off . What’s wrong with that