Yamaha F75F - Checking the Rectifier;Regulator

Charging unit and component
5-26
g. Measure the lighting coil output peak
voltage between all combinations of
the connectors.
h. Stop the engine, and then disconnect
the special service tool.
i. Connect the lighting coil coupler.
2. Measure:
• Lighting coil resistance
Out of specification  Replace.
a. Disconnect the lighting coil coupler
“a”.
b. Measure the lighting coil resistance.
c. Connect the lighting coil coupler.
Checking the rectifier/regulator
Do not connect the battery cables in re-
verse. Otherwise, the rectifier/regulator
could be damaged.
1. Measure:
• Rectifier/regulator output voltage
Out of specification  Check the
rectifi-
er/regulator for continuity.
a. Disconnect the rectifier/regulator cou-
pler “a”.
Test harness QLWD–3 “1”
90890-06923
Resistance (reference data)
0.2 
White (W)–White (W)
G
1
W
G
G
W
W
1
Rectifier/regulator output voltage
(reference data)
Red (R)–Black (B)
r/min
Loaded
1500 3500
DC V 13 13
W
W
W
a
a