Service manual

CHARGING SYSTEM
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 4C-9
5. If reading is between 6.0 and 7.0 volts, rotor field circuit probably is open. Remove
regulator and inspect for worn brushes or dirty slip rings. Replace brushes if less than
1/4 in. (6 mm) long. If brushes and slip rings are in good condition, disassemble and
perform rotor test as outlined under “Component Testing - Rotor” following.
72784
e
a
b
c
d
a-Excitation Wire - PURPLE
b-Sensing Wire - RED/PURPLE
c-Tie Bar
d-Voltmeter (0-20 Volts)
e-Ground
SENSING CIRCUIT
1. Unplug RED/PURPLE lead from voltage regulator.
2. Connect positive (+) voltmeter lead to RED/PURPLE lead and negative (–) voltmeter
lead to ground terminal.
3. Voltmeter should indicate battery voltage. If battery voltage is not present, check sens-
ing circuit RED/PURPLE lead for loose or dirty connection or damaged wiring.
72786
e
a
b
c
d
a-Output Wire - ORANGE
b-Excitation Wire - PURPLE
c-Sensing Wire - RED/PURPLE
d-Voltmeter (0-20 Volts)
e-Ground
INDEX