Testing Positive Rectifiers With C-3829 Tester; Testing Negative Rectifiers With C-3829 Tester - Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual

PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
If negative rectifier shows shorted, isolate stator from rectifier
end shield and retest. Stator winding could be grounded to
s t ator lamination or rectifier end shield which would indicate a
shorted negative rectifier.
POSITVE
RECTIFIER
TEST PROBE
STRAPS
Figure 11-20. Testing Positive Rectifiers
With C-3829 Tester
11-26. TESTING OF CHRYSLER ALTERNATOR RECTIFIER ASSEMBLIES USING TEST LAMP
(Refer to Figures 11-22 and 11-23.)
a. Remove nuts from terminal block studs holding stator windings and positive and negative rectifier
straps.
b. Lift off stator winding terminals and carefully pry stator assembly from end shield.
c. Test rectifiers with 12-volt battery and a test lamp equipped with a no. 67 bulb.
1. Connect one side of test lamp to positive battery post and the other side of lamp to test probe.
2. Connect another test probe to the negative battery post.
d. Place one test probe on rectifier heat sink and the other test probe on strap on top of rectifier. Note
whether or not test lamp lights. Repeat test for each rectifier.
e . Reverse test probes (move probe from rectifier heat sink to rectifier strap and move probe from
r e ctifier strap to rectifier heat sink), and repeat test for each rectifier.
If test lamp lights in one direction but not in the other, rectifier
is satisfactory. If the test lamp lights in both directions, the
rectifier is shorted. If test lamp fails to light in either direction,
rectifier is open.
Added: February 28, 1995
NOTE
NEGATIVE
RECTIFIER
STRAP
Figure 11-21. Testing Negative Rectifiers
NOTE
2E19
Island Enterprises
TEST PROBE
With C-3829 Tester
ELECTRICAL SYSTEM