Jeep 1997 Grand Cherokee Service Manual page 305

ZG
DIAGNOSIS AND TESTING (Continued)
Condition
The battery state-of-charge cannot
be maintained.
The battery will not accept a
charge.
Battery Diagnosis
Possible Causes
1. The battery has an incorrect size
or rating for this vehicle.
2. The battery terminal connections
are loose or corroded.
3. The generator drive belt is loose
or worn.
4. The electrical system is faulty.
5. The battery is faulty.
6. The starting system is faulty.
7. The charging system is faulty.
8. Electrical loads exceed the output
of the charging system.
9. Slow driving or prolonged idling
with high-amperage draw systems in
use.
1. The battery is faulty.
BATTERY
Correction
1. See Specifications in this group.
Replace the incorrect battery with
the correct battery, if required.
2. See the Voltage Drop Test in this
group. Clean and tighten the battery
terminal connections, if required.
3. Refer to Group 7 - Cooling
Systems for more information.
Replace or adjust the generator
drive belt, if required.
4. See the Ignition-Off Draw Test in
this group. Repair the electrical
system, if required.
5. See the Load Test in this group to
determine the battery condition.
Replace the battery, if required.
6. Refer to Group 8B - Starting
Systems for more information.
Repair the starting system, if
required.
7. Refer to Group 8C - Charging
Systems for more information.
Repair the charging system, if
required.
8. Inspect the vehicle for aftermarket
electrical equipment which might
cause excessive electrical loads.
9. Advise the vehicle operator, as
required.
1. See Battery Charging in this
group. Replace the faulty battery, if
required.
8A - 5