Piper Comanche PA-24 Service Manual page 692

PIPER COMANCHE SERVICE MANUAL
TABLE IX·I
SUMM .... Ry OF .... L TERM .... TOR CHECKS
COMPONENT CONNECTION READING
Rotor OhmmeTer from slip unK to shaft
Ve~
low
(Fig
9-17
I
110
volt rest
lamp itom slip ring to shaft
Lamp hghts
Ohm~E"!f."r
across slip rlnge; Very
h~gh
110 yolt test lamp across :>lip ungs Lamp fails to light
Dailer~
and ammeter to shp ungs. across Observe voltmeter and
.;;.lip nngs ammeter readings
StOll
or
Ohmmeter from lead
10
frame Very
[0',"
lFig
9-19)
110
\011 test
lamp from lead to frame Lamp lights
Ohmmeter across each PBIl of Ipads Any reading very high
110
\011
test light across each pair of Iuds Fails to hght
Diode
Ohmmeter .ocross
diode.
then reverse
Both readings very low
(Fig
9-20)
conner! Ions
Both reedi.ngs very high
12 \"olt tesl lamp across diode, then reverse
Lamp fails 10 light in both
conneCllons checks
Lamp
light,;;,
In
both checks
3B16
R.nULTS
Groundec
Grounded
Open
Open
Compare With spec i-
flcatiOns In
IG·186
for shoMs
Grounded
Grounded
Open
Open
Shorted
Open
Open
ShOI:ec!
ELECTRICAL SYST'-
ISSUED:
II1BnZ . .