Suzuki GA413 Service Manual page 946

Ammeter between generator (B)
terminal and battery (+) terminal.
1. Generator 4. Battery
2. Ammeter 5. Load
3. Voltmeter 6. Switch
Volt
Temperature
DIAGNOSIS
GENERATOR
UNDERCHARGED BATTERY
This condition, as evidenced by slow cranking or indicator clear
with red dot can be caused by one or more of the following condi-
tions even though indicator lamp may be operating normal.
Following procedure also applies to cars with voltmeter and amme-
ter.
1) Make sure that undercharged condition has not been caused by
accessories left on for extended period of time.
2) Check drive belt for proper tension.
3) If battery defect is suspected, refer to Battery section.
4) Inspect wiring for defects. Check all connections for tightness
and cleanliness, battery cable connections at battery, starting
motor and ignition ground cable.
Voltmeter between
5) Connect voltmeter and ammeter as shown in left figure.
generator (B) termi-
nal and ground.
Voltmeter
Set between generator B terminal and ground.
Ammeter
Set between generator B terminal and battery (+) terminal.
NOTE:
Use fully charged battery.
6) Measure current and voltage.
No-load Check
1) Run engine from idling up to 2,000 rpm and read meters.
NOTE:
Turn off switches of all accessories (wiper, heater etc.).
Standard current: 10 A maximum
Standard voltage: 14.4 – 15.0 V (at 20 C, 68 F)
NOTE:
Consideration should be taken that voltage will differ
somewhat with regulator case temperature as shown in left
figure.
CHARGING SYSTEM 6H-3