Piper Lance II - Page 474

LANCE
II
SERVICE
MANUAL
TABLE
XI-III.
ELECTRICAL
SYSTEM
TROUBLESHOOTING
(cont.)
Trouble
Cause
Remedy
ALTERNATOR
(cont.)
Zero
output
indicated
on
ammeter
regardless
of
RPM
(Refer to
alterna-
tor
system
test proce-
dure)
(cont.)
Open
field
winding
in
alternator.
Disconnect
field
termi-
nal
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.
If
resistance
is high,
check
brushes
for
spring
tension
and
ex-
cessive
wear
and
re-
place
if necessary.
If
brushes
are
okay
and
field
reads
open,
re-
place
alternator.
Issued:
1/3/78
ELECTRICAL
SYSTEM
2H18