Volkswagen Golf 1999 Service Manual page 4264

Battery, checking
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Charge indicator, readings
Green sufficient charge (and
electrolyte level) OK
Black no charge or
insufficient charge
34
Colorless or yellow
low electrolyte level. Top up with
distilled water immediately
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Electrolyte level, checking
Special tools and auxiliary items
needed
VAS 5045 Battery filling bottle (or
equivalent)
WARNING!
When checking electrolyte level
with sealing caps removed,
illuminate the inside of the
battery housing/cells with a
flashlight.
Keep open flames and sparks
away.
The correct battery electrolyte
specific gravity is an important factor
in maintaining battery performance
and service life.
Insufficient electrolyte levels allow
cell plates to dry, resulting in a loss
of battery capacity (reduced output).
If the cell plates are not completely
submerged by electrolyte, (sulfuric
acid/water mixture) corrosion will
occur on the plates, plate bridges
and cell connector. Optimum battery
function is not possible under these
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critically
13/2/2005