I think a new battery reads 12.6v or a little higher when checked at the terminals. I have notes where I compared the voltage at the terminals to the display voltage on the cluster and found it was ~0.5v lower. I've been reading 11.9v on the display in the mornings for a year or so now. I checked the battery over the past few months and had 12.5v at the battery, which should be good. After 2 days sitting, I went to crank and the battery was weak/slow to turn, but then fired up. I let it run to charge but then shut off and used a trickle charger for the rest of the day (about 6 hours), it read "charged". Today, after work (I drove another vehicle), I did not start the car but I checked the display voltage and it was 11.6v. I did not even try to crank because I am thinking that the voltage at the terminals should be ~12.1v (~.5v higher than the display) which would be too low to crank. Does all that sound right?
Display voltage with weak battery
kclight01
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if I had this issue, I would take it to an auto supply store and have them check it. If it's the battery that came with the car, I would go out and purchase myself a new one. Good luck.
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