Troubleshooting Chart (Electrical System) - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE XI-V. TROUBLESHOOTING CHART (ELECTRICAL SYSTEM)
Trouble
Cause
Remedy
ALTERNATOR
No output from
alternator.
Malfunction of alter-
nator, alternator
output circuit or
field circuit.
Check alternator output
and field circuits.
Refer to Paragraph 11-5.
Check alternator. Refer
to Paragraph 11-7.
Reduced output
alternator.
Open diode.
Check alternator. Refer
to Paragraph 11-7.
STARTER
Motor fails to
operate.
Low battery charge.
Defective or improper
wiring or loose con-
nections.
Defective starter
solenoid or control
switch.
Binding, worn, or im-
properly seated brush,
or brushes with ex-
cessive side play.
Check and recharge if
necessary.
Refer to wiring diagram
and check all wiring.
Replace faulty unit.
Brushes should be a free
fit in the brush boxes
without excessive side play.
Binding brushes and brush
boxes should be wiped clean
with a gasoline (undoped)
moistened cloth. A new
brush should be run in un-
til at least 50% seated;
however, if facilities are
not available for running
in brushes, then the brush
should be properly seated
by inserting a strip of
No. 0000 sandpaper between
the brush and commutator.
Revised: 10/5/83
ELECTRICAL SYSTEM
3E11