Chrysler Concorde 1993 Service Manual page 227

(4) Allow the battery to stabilize for 15 seconds,
and then verify open circuit voltage.
(5) Rotate the load control knob on the tester to
maintain 50% of the battery cold crank rating for a
minimum 15 seconds (Fig. 13).
Fig. 13 Load 50% Cold Crank Rating
After 15 seconds, record the loaded voltage reading
and return the load control to off.
(6) Voltage drop will vary according to battery
temperature at the time of the load test. Battery
temperature can be estimated by the temperature of
exposure over the preceding several hours. If the bat-
tery has been charged, boosted, or loaded a few min-
utes prior to the test, the battery would be slightly
warmer. Refer to Fig. 14 for proper loaded voltage
reading.
Fig. 14 Load Test Temperature
(7) If battery passes load test, it is in good condi-
tion and further tests are not necessary. If it fails
load test, it should be replaced.
BATTERY CHARGING
A battery is considered fully charged when it will
meet all the following requirements:
• It has an open circuit voltage charge of at least
12.4 volts (Fig. 9).
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
• It passes the 15 second load test (Fig. 14).
• The built in test indicator dot is GREEN (Fig. 5).
The battery cannot be refilled with water, it must
be replaced.
WARNING: DO NOT CHARGE A BATTERY THAT HAS
EXCESSIVELY LOW ELECTROLYTE LEVEL. BATTERY
MAY SPARK INTERNALLY AND EXPLODE.
EXPLOSIVE GASES FORM OVER THE BATTERY.
DO NOT SMOKE, USE FLAME, OR CREATE
SPARKS NEAR BATTERY.
DO NOT ASSIST BOOST OR CHARGE A FROZEN
BATTERY. BATTERY CASING MAY FRACTURE.
BATTERY ACID IS POISON, AND MAY CAUSE SE-
VERE BURNS. BATTERIES CONTAIN SULFURIC
ACID. AVOID CONTACT WITH SKIN, EYES, OR
CLOTHING. IN THE EVENT OF CONTACT, FLUSH
WITH WATER AND CALL PHYSICIAN IMMEDI-
ATELY. KEEP OUT OF REACH OF CHILDREN.
CAUTION: Disconnect the battery NEGATIVE cable
first (Fig. 15) before charging battery to avoid dam-
age to electrical systems. Do not exceed 16.0 volts
while charging battery. Refer to the instructions
supplied with charging equipment
Fig. 15 Disconnect Battery Negative Cable
Battery electrolyte will bubble inside of battery
case while being charged properly. If the electrolyte
boils violently, or is discharged from the vent holes
while charging, immediately reduce charging rate or
turn off charger. Evaluate battery condition. Battery
damage may occur if charging is excessive.
Some battery chargers are equipped with polarity
sensing devices to protect the charger or battery from
being damaged if improperly connected. If the bat-
tery state of charge is too low for the polarity sensor
to detect, the sensor must be bypassed for charger to
operate. Refer to operating instructions provided
with battery charger being used.
CAUTION: Charge battery until test indicator ap-
pears green. Do not overcharge.
It may be necessary to jiggle the battery or vehicle
to bring the green dot in the test indicator into view.
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