Okay so I have a 06 infinite g35x that won’t start. I have a new battery, new terminals, & a new negative cable. It has power but once I try to start the car it’ll just click once then all power is gone no lights on the dash, no headlights, no radio. After I disconnect the battery & the negative cable from the car & reconnect all of it it has power but it just does the same thing.

 

Hi Beastboy, no one here is gonna have specific info for your Infinity, this board is exclusively for 1982 through 1992 Chevy Camaro / Pontiac Firebied cars only.
You will need an Infinity forum for specific info.

But, in general, what you describe is a bad connection between the battery and the rest of the car, it could be either on the positive or negative side.......

 

Oh sorry did realize that. Thanks for letting me know!