Isuzu N-Series. Manual - part 627

There are six battery fluid caps at the top of the battery.
These are covered by a paper label.
The battery is completely sealed except for the six small
vent holes at the side. these vent holes permit the es-
cape of small amounts of gas generated by the battery.
This type of battery has the following advantages over
conventional batteries.

1. There is no need to add water during the entire ser-

vice life of the battery.

2. The battery protects itself against overcharging.

The battery will refuse to accept an excessive
charge.
(A conventional battery will accept an excessive
charge, resulting in gassing and loss of battery flu-
id.)

3. The battery is much less vulnerable to self dis-

charge than a conventional type battery.

Diagnosis

1. Visual Inspection

Inspect the battery for obvious physical damage,
such as a cracked or broken case, which would
permit electrolyte loss.
Replace the battery if obvious physical damage is
discovered during inspection.
Check for any other physical damage and correct it
as necessary. If not, proceed to Step 2.

2. Fluid Level Check

The fluid level should be between the upper level
line and lower level line on side of the battery.
a. Correct Fluid Level - Charge the battery.
b. Below Lower Level - Replace battery.

3. Voltage Check

1) Put voltmeter test leads to battery terminals.

a. Voltage is 12.4V or Above - Battery condi-

tion OK.

b. Voltage is Under 12.4V - Go to procedure 2)

below.

2) Determine fast charge amperage from specifi-

cation (See Main Data and Specifications in
this section).
Fast charge battery for 30 minutes at amper-
age rate no higher than specified value.
Take voltage and amperage readings after
charge.
a. Voltage is Above 16V at Below 1/3 of Am-

perage Rate — Replace battery.

b. Voltmeter is Above 16V at Above 1/3 of Am-

perage Rate — Drop charging voltage to
15V and charge for 10 — 15 hours.

c. Voltage is Between 12V and 16V - Continue

charging at the same rate for an additional 3
— 3.5 hours.

d. Voltage is Below 12V — Replace battery.

4. Load Test

1) Connect a voltmeter and a battery load tester

across the battery terminals.

2) Apply 300 ampere load for 15 seconds to re-

move surface charge from the battery.
Remove load.

3) Wait 15 seconds to let battery recover. Then

apply specified load from specifications (See
Main Data and Specifications in this section).
Read voltage after 15 seconds, then remove
load.
a. Voltage does not Drop Below the Minimum

Listed in Following Table - The battery is
good and should be returned to service.

b. Voltage is Less Than Minimum Listed - Re-

place battery.

N6A3487E

Legend

1. Cherge test indicator
2. Upper level
3. Lower level

ENGINE ELECTRICAL 6D-3

Battery Charging

Observe the following safety precautions when
charging the battery:

1. Never attempt to charge the battery when the fluid

level is below the lower level line on the side of the
battery. In this case, the battery must be replaced.

2. Pay close attention to the battery during the charg-

ing procedure.
Battery charging should be discontinued or the rate
of charge reduced if the battery feels hot to the
touch.
Battery charging should be discontinued or the rate
of charge reduced if the battery begins to gas or
spew electrolyte from the vent holes.

3. In order to more easily view the hydrometer blue

dot or ring, it may be necessary to jiggle or tilt the
battery.

4. Battery temperature can have a great effect on bat-

tery charging capacity.

5. The sealed battery used on this vehicle may be ei-

ther quick-charged or slow-charged in the same
manner as other batteries.
Whichever method you decide to use, be sure that
you completely charge the battery. Never partially
charge the battery.

Estimated Temperature

Minimum Voltage

°F

°C

Limit

9.6

9.5

9.4

9.3

-1

9.1

-7

8.9

-12

8.7

-18

8.5

The battery temperature must be estimated by atmo-
sphere temperature and outside temperature (the
battery has been exposed to for the preceding few
hours).

6D-4 ENGINE ELECTRICAL

Jump Starting

Jump Starting With an Auxiliary (Booster) Bat-
tery

Caution:
Never push or tow the vehicle in an attempt to start it.
Serious damage to the emission system as well as other
vehicle parts will result.
Treat both the discharged battery and the booster bat-
tery with great care when using jumper cables.
Carefully follow the jump starting procedure, being care-
ful at all times to avoid sparking.

Warning:

WARNING:
FAILURE TO CAREFULLY FOLLOW THE JUMP
STARTING PROCEDURE COULD RESULT IN THE
FOLLOWING:

1. SERIOUS PERSONAL INJURY, PARTICULAR-

LY TO YOUR EYES.

2. PROPERTY DAMAGE FROM A BATTERY EX-

PLOSION, BATTERY ACID, OR AN ELECTRI-
CAL FIRE.

3. DAMAGE TO THE ELECTRONIC COMPO-

NENTS OF ONE OR BOTH VEHICLES PARTIC-
ULARLY.

NEVER EXPOSE THE BATTERY TO AN OPEN
FLAME OR ELECTRICAL SPARK. GAS GENERAT-
ED BY THE BATTERY MAY CATCH FIRE OR EX-
PLODE.
REMOVE ANY RINGS, WATCHES, OR OTHER JEW-
ELRY BEFORE WORKING AROUND THE BATTERY.
PROTECT YOUR EYES BY WEARING AN AP-
PROVED SET OF GOGGLES.
NEVER ALLOW BATTERY FLUID TO COME IN CON-
TACT WITH YOUR EYES OR SKIN.
NEVER ALLOW BATTERY FLUID TO COME IN CON-
TACT WITH FABRICS OR PAINTED SURFACES.
BATTERY FLUID IS A HIGHLY CORROSIVE ACID.
SHOULD BATTERY FLUID COME IN CONTACT
WITH YOUR EYES, SKIN, FABRIC, OR A PAINTED
SURFACE, IMMEDIATELY AND THOROUGHLY
RINSE THE AFFECTED AREA WITH CLEAN TAP
WATER.
NEVER ALLOW METAL TOOLS OR JUMPER CA-
BLES TO COME IN CONTACT WITH THE POSITIVE
BATTERY TERMINAL, OR ANY OTHER METAL SUR-
FACE OF THE VEHICLE. THIS WILL PROTECT
AGAINST A SHORT CIRCUIT.
ALWAYS KEEP BATTERIES OUT OF THE REACH
OF YOUNG CHILDREN.

Jump Starting Procedure

1. Set the vehicle parking brake.

If the vehicle is equipped with an automatic trans-
mission, place the selector lever in the “PARK” po-
sition.
If the vehicle is equipped with a manual transmis-
sion place the shift lever in the “NEUTRAL” posi-
tion.
Turn “OFF” the ignition.
Turn “OFF” all lights and any other accessory re-
quiring electrical power.

2. Look at the built-in hydrometer.

If the indication area of the built-in hydrometer is
completely clear, do not try to jump start.

3. Attach the other end of the same cable to the pos-

itive terminal of the discharged battery.
Attach the end of one jumper cable to the positive
terminal of the booster battery.
Do not allow the vehicles to touch each other.
This will cause a ground connection, effectively
neutralizing the charging procedure.
Be sure that the booster battery has a 12 volt rat-
ing.

4. Attach one end of the remaining cable to the nega-

tive terminal of the booster battery.
Attach the other end of the same cable to a solid
engine ground (such as the A/C compressor brack-
et or the generator mounting bracket) of the vehicle
with the discharged battery.
This ground connection must be at least 450 mm
(18 in) from the battery of the vehicle whose battery
is being charged.

Warning:

WARNING:
NEVER ATTACH THE END OF THE JUMPER CABLE
DIRECTLY TO THE NEGATIVE TERMINAL OF THE
DEAD BATTERY.

5. Start the engine of the vehicle with the good bat-

tery.
Make sure that all unnecessary electrical accesso-
ries have been turned “OFF”.

6. Start the engine of the vehicle with the dead bat-

tery.

7. To remove the jumper cables, follow the above di-

rections in the reverse order.
Be sure to first disconnect the negative cable from
the vehicle with the discharged battery.

Content .. 625 626 627 628 ..