If your talking about the main ground wire from the battery, its located on the metal wall right to the left of the negative terminal. Just follow the wire that comes off the negative terminal back six inches to a foot and you can see where the ground wire splits off and bolts to the metal.
Yes you should be able to.
Is the timing belt on a j30 infinity run the alternator
How do you change the fuel filiter on an 97 J30 infiniti and how do i know that i need to change it?
how many quarts of transmission fluid goes into an 93 infiniti j30
Yes.
Yes
video on how to replace window lift motor on j30
The battery for an 95 Infiniti J30 is 12 Volts.
yes
See:http://www.fuzzycats.com/j30_diy.htm
I think the answer is you buy another car, the J30 stopped production in 1997.
its usually to the underside of your hood.