Pi, Tom, etc,
Thanks for your input. I decided to simply buy a new battery. Same problem after about 20 minutes of test driving.
The thing I noticed is that even after not having a battery for about 30 minutes, the car still remembered the radio settings.
I suspect what Pi mentioned concerning the security module that also ties the tires and doors. In the past, I had noted the "security" light come on while the car was being driven, no this.
Is there a reset procedure or process?
<DIV>My 2000 all of a sudden started with warnings on the dash. The
obvious "Service Engine Soon" but also "Reduce Engine..." then "Check
Tire Pressure" and "Low Fuel." The thing is that tire pressure is
about 30 (which is lower than what I would like), the tank is more
than half full of gas (the fuel gauge all of sudden marked
empty). Another symptom is that the windows and doorlocks
froze, and do not work.</DIV>
<DIV>Overnight, the lights on the radio plus others stayed on, and
now the batter is dead.</DIV>
<DIV>Any suggestions on early diagnosis - the ECM or a relay?</DIV>