Jeep Cherokee 2000 Service Manual - page 315
(3) Battery chargers vary in the amount of voltage
and current they provide. The amount of time
required for a battery to accept measurable charging
current at various voltages is shown in the Charge
Rate chart. If the charging current is still not mea-
surable at the end of the charging time, the battery
is faulty and must be replaced. If the charging cur-
rent is measurable during the charging time, the bat-
tery may be good and the charging should be
completed in the normal manner.
CHARGING TIME REQUIRED
The time required to charge a battery will vary,
depending upon the following factors:
•
Battery Capacity
A completely discharged heavy-duty battery requires
twice the charging time of a small capacity battery.
•
Temperature
A longer time will be needed to charge a battery at
-18° C (0° F) than at 27° C (80° F). When a fast bat-
tery charger is connected to a cold battery, the cur-
rent accepted by the battery will be very low at first.
As the battery warms, it will accept a higher charg-
ing current rate (amperage).
•
Charger Capacity
A battery charger that supplies only five amperes
will require a longer charging time. A battery charger
that supplies twenty amperes or more will require a
shorter charging time.
•
State-Of-Charge
A completely discharged battery requires more charg-
ing time than a partially discharged battery. Electro-
lyte is nearly pure water in a completely discharged
battery. At first, the charging current (amperage) will
be low. As the battery charges, the specific gravity of
the electrolyte will gradually rise.
WARNING: NEVER
EXCEED
TWENTY AMPERES
WHEN CHARGING A COLD (-1° C or 30° F) BAT-
TERY. THE BATTERY MAY ARC INTERNALLY AND
EXPLODE. PERSONAL INJURY AND/OR VEHICLE
DAMAGE MAY RESULT.
REMOVAL AND INSTALLATION
BATTERY CABLES
Both the battery negative cable and the battery
positive cable are serviced in the battery wire har-
ness. If either battery cable is damaged or faulty, the
battery wire harness unit must be replaced.
REMOVAL
(1) Turn the ignition switch to the Off position. Be
certain that all electrical accessories are turned off.
(2) Loosen the battery negative cable terminal
clamp pinch-bolt hex nut.
(3) Disconnect the battery negative cable terminal
clamp from the battery negative terminal post. If
necessary, use a battery terminal puller to remove
the terminal clamp from the battery post.
(4) Loosen the battery positive cable terminal
clamp pinch-bolt hex nut.
(5) Disconnect the battery positive cable terminal
clamp from the battery positive terminal post. If nec-
essary, use a battery terminal puller to remove the
terminal clamp from the battery post.
(6) Unlatch and remove the B(+) terminal stud
cover from the front of the Power Distribution Center
(PDC).
(7) Remove the nut that secures the battery posi-
tive cable eyelet terminal and the generator output
cable eyelet terminal to the B(+) terminal stud on the
PDC.
(8) Remove the battery positive cable eyelet termi-
nal and the generator output cable eyelet terminal
from the B(+) terminal stud on the PDC.
(9) Disconnect the battery wire harness connector
from the headlamp and dash wire harness connector
located below the front of the PDC.
Charge Rate
Voltage
Hours
16.0 volts maximum
up to 4 hours
14.0 to 15.9 volts
up to 8 hours
13.9 volts or less
up to 16 hours
Battery Charging Timetable
Charging
Amperage
5
Amperes
10
Amperes
20
Amperes
Open
Circuit
Voltage
Hours Charging at 21° C (70° F)
12.25 to
12.49
6 hours
3 hours
1.5 hours
12.00 to
12.24
10 hours
5 hours
2.5 hours
10.00 to
11.99
14 hours
7 hours
3.5 hours
*Below
10.00
18 hours
9 hours
4.5 hours
*Refer to Charging A Completely Discharged Battery
8A - 18
BATTERY
XJ
SERVICE PROCEDURES (Continued)