ignition AUDI A4 1998 B5 / 1.G Battery Workshop Manual

27-13
Use the following procedure for testing the
voltage of a battery which is not under load:

- Switch ignition off.

- Disconnect battery Ground strap.

- Measure voltage between battery terminals.


12.5 volts or higher: battery OK

Below 12.5 volts: recharge battery
immediately Page 27
-21

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27-15
Use the following procedure to test the specific
gravity in all of the battery cells:

- Switch ignition off.

- Remove all cell caps.

The higher the specific gravity of the drawn electrolyte, the higher the
indicator will float.
The specific gravity of the electrolyte can be read in kg/dm3 on the
hydrometer scale. - Immerse tip of hydrometer into battery cell and draw out enough
electrolyte to allow indicator to float freely.
- Compare measured value indicated on hydrometer to values indicated
in table below:
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27-19

Load test procedure

- Switch ignition off.

- Read battery tester operating instructions.

Battery tester operating instructions
Table - Observe carefully:
Connect the clamps to the battery terminals as required by the tester
instruction manual. The clamps must make good contact with the
battery terminals.
- Load current varies depending on battery capacity, set load current on
tester appropriately. - Obtain load current from table below.

The minimum voltage (the voltage which must be exceeded) varies
and can be obtained from the table below.
The load current and minimum voltage vary depending on the
capacity of the battery. Battery
capacity Cold cranking
amps Load
current Minimum voltage
(limit)
70 Ah 340 A 200 A 9.5 V
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27-22

Battery charging procedure

- Switch off battery charger.

- Switch ignition off.

- First disconnect battery Ground (GND) strap;
then disconnect positive cable from battery.

- Connect positive cable of battery charger to
positive terminal of battery.

- Connect negative cable of battery charger to
negative terminal of battery.

- Adjust charging current on battery charger to
battery capacity. It should be equivalent to
approximately 10% of battery capacity or about
6 A for 60 Ah battery.

- Switch on battery charger.
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