With the engine not running you should read 12.6 volts on a fully charged battery. With the engine running you should read from 13.5 to 15.5 volts at the battery posts.
Should be battery Group Size 78.
14.2
Attached to neg post on battery should be labelled with (-) sign if not color coded black.
It should be an 12N 12A-4A battery
I would buy at least a 600 CCA battery. Buy the largest CCA battery you can find if you live in a cold climate.
The back seat should pop out and your battery and some fuse boxes are under your back seat.
Ideal is 14.2 volts 13.8 is acceptable
Engine running at idle you should read 13.5 to 15.5 volts.
it should be in your owners manual. but it should just be bolted down just unscrew those bolts and it should come out
A fully charged good battery is designed to last 21 days in the newer vehicles How old is your battery?Check parasytic load on vehicle should be .07 amps
Under the rear seat. Lift on the front of the rear seat and should pop out somewhat easily.
If you unhook the battery for an hour, when you re-connect the cable it should reset the computer.