Battery Runs Down Quickly - Suzuki GSF1250 Service Manual

1J-2 Charging System:
Condition
Battery overcharges
Battery runs down quickly Trouble in charging system.
Battery "sulfation"

Battery Runs Down Quickly

Troubleshooting
Step
1 Check accessories which use excessive amounts of
electricity.
Are accessories being installed?
2 Check the battery for current leakage. Refer to "Battery
Current Leakage Inspection (Page 1J-3)".
Is the battery for current leakage OK?
3 Measure the regulated voltage between the battery
terminals. Refer to "Regulated Voltage Inspection (Page 1J-
3)".
Is the regulated voltage OK?
4 Measure the resistance of the generator coil. Refer to
"Generator Inspection (Page 1J-3)".
Is the resistance of generator coil OK?
5 Measure the generator no-load performance. Refer to
"Generator Inspection (Page 1J-3)".
Is the generator no-load performance OK?
6 Inspect the regulator/rectifier. Refer to "Regulator / Rectifier
Inspection (Page 1J-8)".
Is the regulator/rectifier OK?
7 Inspect wirings.
Is the wirings OK?
Possible cause
Faulty regulator/rectifier.
Faulty battery.
Poor contact of generator lead wire
coupler.
Cell plates have lost much of their active
materials a result of overcharging.
Internal short-circuit in the battery.
Too low battery voltage.
Too old battery.
Incorrect charging rate. (When not in
use battery should be checked at least
once a month to avoid sulfation.)
The battery was left unused in a cold
climate for too long.
Action
Correction / Reference Item
Replace.
Replace.
Repair.
Check the generator, regulator/rectifier and
circuit connections and make necessary
adjustments to obtain specified charging
operation.
Replace the battery and correct the charging
system.
Replace the battery.
Recharge the battery fully.
Replace the battery.
Replace the battery.
Replace the battery if badly sulfated.
Yes
Remove accessories.
Go to Step 3.
• Faulty battery
• Abnormal driving
condition
Go to Step 5.
Go to Step 6.
Go to Step 7.
Faulty battery
B718H11A04002
No
Go to Step 2.
• Short circuit of wire
harness
• Faulty electrical
equipment
Go to Step 4.
• Faulty generator coil
• Disconnected lead
wires
Faulty generator
Faulty regulator/rectifier
• Short circuit of wire
harness
• Poor contact of
couplers