4C-8 - CHARGING SYSTEM 90-823225--1 1096
4. Remove four nuts holding excitation and sensing
wires and Phillips screw. Remove regulator cover
and install wires and nuts for testing. Connect a
jumper wire from the ground stud to the brush ter-
minal on the lower right-hand side of the brush
assembly. Restart engine and gradually increase
engine speed to 1500 RPM while observing volt-
meter. DO NOT allow voltage to exceed 16 volts.
5. If a voltmeter reading of 14.5 volts or above is
now obtained, voltage regulator is faulty and
must be replaced. If voltmeter reading is below
14.5 volts, inspect brushes and slip rings for
wear, dirt or damage. If brushes and slip rings are
good, alternator is faulty internally. Disassemble
alternator and test components, as outlined un-
der “Alternator Repair,” following.
72971
b
c
d
a
a - Ground
b - Brush / Regulator Assembly
c - Brush Terminal
d - Jumper Wire (Solder Connection Ground)
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