THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 2
Jun 1/03
2F20
24-00-00
CHART 1 (Sheet 1 of 4)
TROUBLESHOOTING ELECTRICAL SYSTEM
Trouble Cause Remedy
Zero output indicated Open field circuit. With the battery switch
on ammeter regardless turned on, check for battery
of rpm (refer to alternator voltage from the main bus
system test procedure). through the entire field
circuit to the alternator field
terminal.
Measure the voltage from
the ground (-) to the
following points (+) in
sequence: bus bar, field
circuit breaker (5A),
field terminals of master
switch voltage regulator
and alternator field
terminal.
Interruption of voltage
through any of these points
isolates the faulty
component or wire which
must be replaced. (See
schematic, Chapter 91.)
Open output circuit. With the battery switch
turned on, check for battery
voltage from the airplane’s
main bus through the entire
output circuit to the
alternator battery post.
Measure voltage from
ground (-) to the following
points (+) in sequence: bus
bar, output current limiter,
ammeter, and alternator
battery post. Interruption of
voltage through any of
these points isolates the
faulty component or wire
which must be replaced.
(See schematic,
Chapter 91.)
Open circuit in alternator
output will usually burn out
ALT annunciator and the 50
ohm resistor. Check 5 amp
in-line fuse.
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