THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 4
Jun 1/03
2F22
24-00-00
CHART 1 (Sheet 3 of 4)
TROUBLESHOOTING ELECTRICAL SYSTEM
Trouble Cause Remedy
Output indicated on Open rectifier. If any of the six rectifiers
ammeter does not meet pressed into the rear bell
minimum values specified housing of the alternator
in alternator system open up internally, it will
test procedure. result in a definite limitation
(continued) on the current that can be
drawn from the alternator.
After having checked the
previous causes of low
output it can be assumed
that a faulty rectifier exists.
See 24-30-00, Alternator
Overhaul, Diode Testing.
Field circuit breaker trips. Short circuit in field Disconnect field wiring at
circuit. terminal of alternator. Turn
on master switch. If breaker
continues to trip,
disconnect each leg of field
circuit, working from
alternator towards the
circuit breaker until breaker
can be reset and will hold.
Replace component or wire
which was isolated as
defective. (See schematic,
Chapter 91.)
Short circuit in field Disconnect field wiring at
winding of alternator terminal of alternator.
Turn on master switch. Set
breaker, and if breaker fails
to trip, this isolates short
circuit to field of alternator
itself. Check brush holders
for shorting against frame.
If there are no obvious
signs of a physical short
circuit at field terminal or
brush holder, replace
alternator.
Note: Intermittent short circuit. Internal short circuit of the field can occur at various positions of the
rotor, therefore, reconnect field, reset breaker.
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