Originally Posted by BillBoost37
If that doesn't fix you up or only helps temporarily you may want to consider over riding the system by adding in the resistance value needed to start the car. It'* pretty simple once you locate the right wires.
That'* where I thought I was headed -- resistor replacement.
But the light coming back on worried me until your comment about the contacts inside the key cylinder might need cleaning. The keys swung when I went over a bump the second time the security light came on; that could have changed the contact pressure inside the cylinder.
I don't find a procedure for cleaning the cylinder key contacts. Can someone link me to the right place? Or suggest what to use to clean the contacts?