Has anyone any idea why a 1996 XJ40 V12 would have current loss of 3.00 amps at the battery with car shut down i.e: with ignition key removed? The ND Alternator has been checked by 2 independant people & is okay as is its capacitor. The flow stops if the round plug at the rear of the alternator is removed. There is no current flowing at all at the fuses.

 

Replace the alternator, its no good.

 

+heaps.

If the drain stops with any item "out of the system" then that item is the culprit.

The regulator "leaking to earth" is a fairly common issue, as are diodes leaking.

I am looking for similar on our S Type,and the alternator unplugging was the FIRST item I did, no such luck however, so the search continues.