Battery dead over winter, will not start.

[SJMilw]

Went to take the C7 out of hibernation and the car was dead. Checked the battery tender and it was on. Checked the voltage of the battery, only 5 volts. Placed a charger on it for 30 minute, still only 5 volts.

Bought a new battery, a real total pain if I may say, hooked up everything, I checked the voltage, 12volts was read. Key FOB door open, now opens gas tank, parking lights flash, no power to start. I reprogramed fob, headlights, tail lights and brake lights work. that's about it. No power to windows, trunk and doors won't open.

 

[FloridaMatt]

A new battery that's bad is not unheard of. If it's fully charged it should read 13+ volts. Despite it being a pita, pull it and have it tested. Or get a jump start and go to an auto store to have it tested.

 

[SJMilw]

Thanks, I did throw the charger on it to see if that's the problem. I would think the dash lights would go on.

 

[SJMilw]

Found the fix. After a day and a half of trying several suggested fixes, one finally worked. I disconnected both the positive and negative cables, and then touched them both together. Not sure what to expect, I connected everything back up, and BAM!!!! the doors opened, the lights came on, and Red started right up.

Talked to a our Corvette guru in our club and he had asked an engineer with GM what it was I did, and reported that it's called the Global Reset. Just reporting what I did and that it worked.