Alternator Removal; Testing-Off Vehicle; Alternator Tester; Rotor (Field) Winding-Short Circuit-To-Ground Test - Jeep 1987 Wrangler Workshop Manual

CHARGING SYSTEM - DELCO
o operate the engine at moderate speed as
required
• adjust the carbon pile as required to obtain
maximum current output
• check the field winding, diode trio, rectifier
bridge, stator, and test the regulator with an
approved tester as covered in the Testing
Section
Alternator Tester
Many t e s t e r s are a v a i l a b l e to c h e c k the
alternator. They provide a quick ON-VEHICLE
test, and can save time over conventional
diagnostic methods. Consult the manufacturer's
instructions for usage.
ALTERNATOR REMOVAL
NOTE: All bolt and screw threads are in metric
dimensions.
Remove the alternator drive belt from the
alternator pulley.
Remove the alternator from the mounting
bracket.
TESTING - OFF-VEHICLE
Rotor (Field) Winding-Short Circuit-to-Ground
Test
Test Procedure
To perform this test, remove the rotor and front
housing assembly from the stator and rear
housing assembly. Refer to Alternator Overhaul
for the procedure.
Perform the test with an ohmmeter set for the
x1000 ohm scale or with a 110-volt test lamp.
WARNING: Failure to disconnect the battery
negative cable before disconnecting the output
wire connector (RED) from the alternator may
result in injury.
Disconnect the battery negative cable.
Disconnect the two-terminal plug connector and
output wire connector (RED) at the back of the
alternator.
Remove the mounting and adjusting bolts,
washers, and nuts.
C- 19