[DeTomaso] Voltmeter vs Ammeter-Ammeter wins

[Thomas Tornblom]

Measure the voltage across the battery when it drops to +15A.

A battery with a shorted cell would make the ammeter show lots of amps 
going to the battery, but with a low voltage across the battery.

Remember that the regulator tries to keep the voltage somewhere between 
13-14V, and if a battery cell is shorted, it will nominally have 10V, 
and possibly up to about 12V with lots of current from the alternator.


2010-08-11 20:45, PersoCaddy at aol.com skrev:
> Hi, for 25 years my ammeter has always been at 0 when driving. This  last
> 6 months or so, it moves to  + 60 amps then after a time goes to  + 15. Now
> I have the original 1972 Alt. rebuilt once to 90 amps 30 years ago.  The
> voltage regulator has been swapped but still same readings I am coming  to  the
> conclusion the Alt. is not up to par. Car always starts battery  about 1
> year old, but  I think I would like to do a load test. Pat Orlando  1972
> Yellow Pantera S/N 4011

Cheers,
Thomas