DaimlerChrysler LH New Yorker 1994, Электронное руководство по обслуживанию

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It is important when using the Test Indicator that
the battery be level and have a clean top to see the
correct indications. A light may be required to view
the Indicator.
WARNING: DO NOT USE OPEN FLAME NEAR
BATTERY. EXPLOSIVE GASES FORM ABOVE BAT-
TERY.
STATE OF CHARGE TESTS
USING TEST INDICATOR
The built-in test hydrometer (Figs. 3, 4 and 5) mea-
sures the specific gravity of the electrolyte. Specific
Gravity (SG) of the electrolyte will show state-of-
charge (voltage). The test indicator WILL NOT show
cranking capacity of the battery. Refer to Battery
Load Test for more information. Look into the sight
glass (Figs. 4 and 5) and note the color of the indica-
tor (Fig. 5). Refer to the following description of col-
ors:
GREEN = 75% to 100 state-of-charge
The battery is adequately charged for further test-
ing and may be returned to use. If the vehicle will not
crank for a maximum 15 seconds, refer to BATTERY
LOAD TEST in this Group for more information.
BLACK OR DARK = 0 to 75 state-of-charge
The battery is INADEQUATELY charged and must
be charged until green dot is visible, (12.4 volts or
greater) before the battery is tested or returned to
use. Refer to Causes of Battery Discharging in this
Group for more information.
YELLOW OR BRIGHT COLOR = Battery must be
replaced.
WARNING: DO NOT CHARGE, ASSIST BOOST,
LOAD TEST, OR ADD WATER TO THE BATTERY
WHEN YELLOW OR BRIGHT COLOR DOT IS VIS-
IBLE. PERSONAL INJURY MAY OCCUR.
A yellow or bright color dot shows electrolyte level
in battery is below the test indicator (Fig. 5). Water
cannot be added to a maintenance free battery. The
battery must be replaced. A low electrolyte level may
be caused by an over charging condition. Refer to
Generator Test Procedures on Vehicle.
CAUSES OF BATTERY DISCHARGING
It is normal to have a small 5 to 30 milliamperes
continuous electrical draw from the battery. This
draw will take place with the ignition in the OFF
position, and the courtesy, dome, storage compart-
ments, and engine compartment lights OFF. The con-
tinuous draw is due to various electronic features or
accessories that require electrical current with the
ignition OFF to function properly. When a vehicle is
not used over an extended period of approximately 20
days the Main Fusible Link Connector (Fig. 6) should
be disconnected. This is located near the battery on
the engine wiring harness. Disconnection of this con-
nector will help prevent battery discharging. Refer to
Fig. 7 Battery Diagnostics.
ABNORMAL BATTERY DISCHARGING
(1) Corroded battery posts, cables or terminals.
(2) Loose or worn generator drive belt.
(3) Electrical loads that exceed the output of the
charging system due to equipment or accessories in-
stalled after delivery.
(4) Slow driving speeds in heavy traffic conditions
or prolonged idling with high-amperage electrical sys-
tems in use.
(5) Defective electrical circuit or component causing
excess Ignition Off Draw (IOD). Refer to Ignition Off
Draw (IOD).
(6) Defective charging system.
(7) Defective battery.
BATTERY OPEN CIRCUIT VOLTAGE TEST
An open circuit voltage no load test shows the state
of charge of a battery. Also, if it will pass a load test of
50 percent of the battery cold crank rating. Refer to
Battery Load Test. If a battery has an voltage reading
of 12.4 volts or greater, and will not endure a load
test, it is defective and replacement would be re-
quired. To test open circuit voltage, perform the fol-
lowing operation:
(1) Remove both battery cables, negative first. If the
battery has been boosted, charged, or loaded just
prior to this operation, allow the battery a few min-
utes to stabilize.
Fig. 6 Ignition OFF Draw Test
8A - 4 BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS