Piper SARATOGA PA-32-301 Maintenance Manual page 169

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
CHART 2401. TROUBLESHOOTING (ALTERNATOR) (cont)
Trouble Cause
Remedy
Output indicated on am-
meter does not meet mini-
mum values specified in al-
ternator system test pro-
cedure. (cont)
High resistance connec-
tions in field or output
circuit.
Check visually for loose bind-
ing posts at the various junc-
tion points in system. alter-
nator battery post. lugs on
ammeter, connections at volt-
age regulator. circuit breaker.
etc. (See wiring schematic.
Chapter 91.) Examine
crimped terminal ends for
signs of deterioration at
crimp or strands of broken
wire at crimp. Tighten any
loose binding posts or re-
place bad wire terminals.
Open rectifier.
If any of the six rectifiers
pressed into the rear bell
housing of the alternator
open up internally, it will re-
sult in a definite limitation
on the current that can be
drawn from the alternator.
After having checked the
previous causes of low out-
put it can be assumed that a
faulty rectifier exists.
See paragraph titled In-
spection and Testing of
Components.
Field circuit breaker
trips.
Short circuit in field
circuit.
Disconnect field wiring at
terminal of alternator. Turn
on master switch. If breaker
continues to trip. proceed to
disconnect each leg of field
circuit, working from the al-
ternator towards the circuit
breaker until breaker can be
reset and will hold. Replace
component or wire which
was isolated as defective. (See
wiring schematic, Chapter
91.)
24-02-00
Page 24-04
Issued: January 2, 1980
1H1