THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 5
Jun 1/03
2F23
24-00-00
CHART 1 (Sheet 4 of 4)
TROUBLESHOOTING ELECTRICAL SYSTEM
Trouble Cause Remedy
Field circuit breaker trips. Short circuit in field
(continued) winding of alternator.
(continued)
CAUTION: TURN MAGNETO SWITCH TO OFF BEFORE TURNING PROP.
Pull propeller slowly by
hand turning alternator
rotor through 360° degrees
of travel. Observe circuit
breaker for signs of
tripping.
Ammeter indicates 60 amps Short to ground in alternator Check condition of teflon
at 1400 rpm and above, ALT output wiring. insulators on feet of diode
annunciator light on. heat sink. When the
mounting screws are over
torqued they can cut
through insulators causing
a short-to-ground.
Check other wiring for
chafing, etc.
Excessive ammeter Excessive resistance Check all connections and
fluctuation. in field circuit. wire terminals in field circuit
for deterioration such as
loose binding posts, broken
wire strands at terminals,
etc. Tighten all connections
and replace faulty
terminals.
High field circuit If problem persists, jump
resistance. across the terminals of the
following components one
at a time until the faulty unit
is isolated.
a. Field 5-amp (alternator
circuit protector).
b. Alternator switch.
c. Overvoltage relay.
Defective voltage regulator. Replace voltage regulator.
Faulty grounds. Completely clean all
corrosion from grounding
points.
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