>
> Your battery terminals (or the ground lug at the far end of the black
> one) are loose or corroded. Those kind of problems are temperature
> sensitive, as is the Main Relay problem. That's why it worked OK later
> after the temperature changed. Yours is probably a loose terminal.
>
> 'Curly'

I got my Main Relay changed in 9/2006 because i had trouble starting
it on a hot day, it was turning over but not catching, and the dash
controls lit up. This time it was as if the battery was not connected
at all, nothing lit up. When it started working 1-1/2 hrs later, I
turned on the radio, and had to reenter the security code so that
confirms a disconnection. It was not hot, parked in the shade.
However, I changed the battery today because it was showing less than
12 volts and it's more than 3 years old and I just want to rule out a
bad battery. When I took out the old battery, I noticed that the
terminals were snug, and there was no corrosion, I usually clean them
periodically. I'm don't think there's a disconnection at the
battery, any suggestions on where else I could look.