CIRCUIT GENERATORS, you must disconnect the
field circuit lead at the regulator and momentarily touch
this lead to the regulator BATTERY terminal.
Remember, alternators do not require polarization.
Various instruments can be used to locate problems
in the charging system. The following sections describe
troubleshooting carried out with the voltampere tester
An alternator output test is one of the first tests to
be made with the voltampere tester. To conduct this test,
perform the following: disconnect the field wire at the
alternator, and connect the field lead of the tester (fig.
4-9) to the field terminal of the alternator. Make sure the
proper connector for the alternator being tested is used.
Figure 4-8.-Voltampere tests.
Figure 4-9.-Alternator output test.
Do NOT allow the vehicle field wire to contact
Start the engine and bring the rpms up to the
manufacturers specifications. While observing the
AMMETER scale for the highest current indication,
adjust the load increase knob. The field activation
switch will be held in the test position during this
procedure. If the ammeter indication reads at the
normal output (+ or -) 10 percent, the regulator must
be replaced. When the ammeter indication reads at
low or no output, the alternator must be repaired or
When a vehicle is equipped with an A type of field
circuit generator, you may conduct a generator test by
disconnecting the field at the generator and