16
45
5
STANDARD ALTERNATOR OUTPUT TEST
After the battery or batteries have been tested and were good (or have
been replaced) and after the charging cables have been tested and
were good (or were repaired or replaced) you may proceed to test the
alternator.
This test can also be selected
from the main menu by selecting
Alternator Test then press (Y
Enter).
If the unit is setup to require
visual checks you will be asked to
inspect belt condition
…
Inspect cables and connections before
alternator rating is entered.
…and tension.
BATTERY TEST
BATTERY BANK
VDROP TEST
>ALTERNATOR
>INSPECT BELT
CONDITION.
'Y' TO CONTINUE
>INSPECT BELT
TENSION.
'Y' TO CONTINUE
>INSPECT CABLES
AND CONNECTIONS
'Y' TO CONTINUE
CONNECT LARGE LEADS
TO THE ALTERNATOR
'Y' TO CONTINUE
Red to output terminal and Black
to ground / case output adapters
recommended.
CONNECT LARGE LEADS
TO THE ALTERNATOR
'Y' TO CONTINUE
Check the alternator tag or
housing and use the +/- key to
select the rated output
See picture below
ALTERNATOR BENCH TESTING (Cont.)
#48 12V BENCH BAD
ALTERNATOR HIGH
RIPPLE
REG. 14.39V
#151 12V ALTER.
HIGH REG. 15.02V
BAD DIODE
PARTIAL OUTPUT
#148 12V ALTER.
LOW REG. 12.74V
LOW OUTPUT
#150 12V ALTER.
HIGH REG. 15.02V
GOOD DIODE
LOW OUTPUT
This is a defective alternator. Not only
does it have defective components -
the regulation set point is high.
This is a defective alternator. The
output and regulation are low. Defective
batteries can cause this condition
Defective alternator. It can not handle
the load and it is regulating high.
#147 12V ALTER.
GOOD REG. 14.15V
GOOD DIODE
GOOD OUTPUT
#149 12V ALTER.
LOW REG. 12.74V
BAD DIODE
LOW OUTPUT
This result indicates the alternator
is in good working order
This is a defective alternator. It
has a defective component and is
producing high ripple
