Just wondering is the battery on a 2004 g35 coupe positive or negative grounded? Thanks

 

negative

 

Every modern car uses negative grounding.

 

when was it ever positive?

 

Back in the ancient days of cars(1930's to early 50's), some were positive grounded. It caused problems with spark plugs losing their gap as a result of a corrosive buildup on the electrodes every few thousand miles, so they stopped using it and switched to a negative grounded system in every car henceforth. I remember reading about this many years ago in an automotive tech manual as a bored teen who was inquisitive about everything car-related.... LOL.

 

Thanks for the info guys

 

I had a 1966 MGB that had positive grounded system and used 2 six volt batteries connected in series to get the 12 volts used.