Maintenance Free Battery Testing
CONDITION CAUSE REMEDY
VISUAL INSPECTION Visible damage, terminal
leakage, etc
Cannot be used. Replace.
ELECTROLYTE LEVELS &
STATE OF CHARGE
NOTE: PROCEED DIRECTLY
TO CAUSE THAT APPLIES
Level at top of plates. Water
cannot be added
Replace.
If there is an indicator and it
shows low level
Replace.
Level OK, unknown, or water
can be added. Stabilized
voltage below 12.4 volts*
Add water if needed (if
possible). Charge, then turn
on high-beam head lamps (or
15 amp load for 15 seconds).
Proceed to load test.
If there is an indicator and it
shows low charge
Charge, then turn on high-
beam head lamps (or 15 amp
load for 15 seconds).
Proceed to load test.
Stabilized voltage above 12.4
volts* or indicator indicates
charged
Perform load test.
LOAD TEST Perform load test using the
following procedure:
1. Connect voltmeter and
ampere load equal to 1/2
cold cranking amperes @ 0°F
(-18°C) rating of battery for
15 seconds.
Observe voltage at 15
seconds with load on.
3. Refer to voltage chart
If the voltage remains below
the voltage chart levels,
replace battery. If the voltage
is equal to or above chart
values, return to service.
VOLTAGE CHART
ESTIMATED ELECTROLYTE TEMPERATURE
MINIMUM REQUIRED
VOLTAGE UNDER 15
SECOND LOAD
70°F (21°C) & ABOVE 9.6
60°F (16°C) 9.5
50°F (10°C) 9.4
40°F (4°C) 9.3
30°F (-1°C) 9.1
RT500
Troubleshooting
238 REVISED:
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