Piper Cherokee Six - Page 602

Trouble
PIPER CHEROKEE SIX SERVICE MANUAL
TABLE
X-III. ELECTRICAL
SYSTEM
TROUBLESHOOTING
(cont.)
Probable Cause
Zero output
indicated on
Open output circuit.
ammeter regardless of (cont)
RPM (refer
to
alter-
nator system
test
procedure)
(cont)
Open field
winding
in
alternator.
Isolation Procedure
and Remedy
through
entire
output
circuit to alternator
battery post. Measure
voltage from ground (-)
to the
following
points
(+) in sequence: buss
bar, output circuit
breaker (60A), am-
meter, and alternator
battery post.
Interruption of voltage
through any of these
points isolates the
faulty component
or
wire which must be
replaced
(See Figure
10-1)
Disconnect field terminal
of alternator
from field
wiring and check for
continuity from field
terminal to ground with
ohmeter
(20-100
ohms)
depending on brush
contact resistance.
(Pull propeller slowly
by hand turning alter-
nator
rotor
through
360 of travel.)
CAUTION
Turn magneto switch to
off before turning prop.
ELECTRICAL
SYSTEM
Issued: 8/17/72
3D2