[PROJECTRB240SX]

Those Are The Three Common Locations For Grounds On A Vehicle. Neg Battery Post, Engine Block, And Frame Rail (or Other Chassis Location). The Only Time Your Alternator Should Have A Complete Circuit (power Through The Alternator To Ground) Is When You Turn The Key On. It Sounds Like You Have A Crossed Wire, Shorted Wire, Or Possibly A Bad Alternator. I Would Check The Wire The Connect To The Alternator To Rule Them Out Then I'd Swap The Alternator Out. Is This In An Engine Swap? If It Is Did You Use The Swapped Engines Lower Harness Or Adapt The Ka Harness? If You Used The Ka Harness Besure You Didn't Mix Two Wires Up, If You Used The Engines Original Harness Make Sure You Used The Proper Connections At The Fuse Box.