Have you read the FSM AKA Service Manual?
I would read this:
http://www.nicoclub.com/FSM/J30/1997_J30/el.pdf as it pertains to your problem, Go to LOCATION OF ELECTRICAL UNITS Then go to page EL-268 and you will see where the circuit breaker is located.
Or you could always ask your Infiniti deaer where it located because they have a program called Nissan FAST which you can get as well but it shows them a picture of where the part is and how much it costs and more.
But when you solve your problem with the windows I would read the rest of the service manual:
http://www.nicoclub.com/FSM/J30/1997_J30/
Good Luck and welcome to NICO