I took my 2010 G37 to the dealer to have the transmission fluid flushed at 90,000 miles. He checked some things out and said my battery was weak. Need a new battery. OK, through one in, its 7 years old. Picked the car up the next morning and on my 70 mile drive home, I noticed that my clock was not working.
When I get home, I find that my Homelink garage door opener is also not working.
So, I do what all car owners do...I Google it. I found that if the battery is not installed according to the Infiniti step-by-step procedure, this issue with the clock and Homelink is result.
To install the battery, all electrics must be in the off position, including the auto-on-off headlights. The ground battery cable must be removed first (we know that). Care must be taken not to create a short by allowing the ground cable to touch the positive cable. (we know that too).
The dealer mechanic's failure to follow procedure blew a fuse. The fuse is the 6th from the top, left side, in the fuse block on the kick panel near the parking brake pedal. It is a 10 amp fuse marked ELEC PARTS (BAT). It is the only one on the diagram in black with white print. I removed the 10 amp fuse and inserted the spare that is in the box and ALL IS WELL.
The Home link did not even have to be reprogrammed.
So, if you are in need of a new battery, make sire the guy at Auto Zone or wherever knows what he is doing or if you do it yourself, make sure everything is turned off.