I have a 1997 Buick Century 3.1 V6 engine and it runs excellent... Has 97,000 original miles. Second owner. This is my "spare " vehicle...
Last week when I locked it up I was told that my interior lights were still on...I go out and check and sure enough , they were on...I turn off with the remote on the key fob..
I also verified that they were not on by the headlight switch ....short time later same thing again...Interior lights on....I did this three separate times. After the last time apparently they came back on and drained the battery overnight...
Soo ,a few days later when I go to drive this car the battery is completely dead. I removed the battery and I charged it up for a few hours and the battery is still pulling close to 11 amps after a couple of hours... The battery is reading 12.5 volts with my voltmeter... I install the battery and car starts right up and runs perfect.....BUT what I notice is that on my instrument cluster is : Temperature gauge is pegged to the right , oil light flashing red- low oil, Zero showing where odometer used to read mileage , NO PRNDL indication for transmission... I do see a 1 2 on the very very right of the digital instrument cluster.... HVAC temperature reading is in Celsius where it used to read Fahrenheit...ANY IDEAS WHAT IS GOING ON...?.
Thanks in advance and any helpful advice is much appreciated.

Sounds like a short between circuits.

Any ideas where to start looking for the short...I was hoping someone who maybe has had this SAME issue would reply with a helpful reply...Thanks !

Take the cluster out and solder all the joints you can.
Here'* the diagram. More that likely you have a cold solder joint at a ground.

Thanks so much for the info.... I will post as I progress toward resolving this issue....Eddie