Porsche 928 S 1986 Driver Manual page 79

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Battery check and care
Because of the danger of short circuiting, the
battery should always be disconnected before
starting any work on the electrical system.
Disconnect the battery earth strap as shown
by the arrow in the picture.
Disconnecting the battery whilst the en-
gine is running destroys the alternator.
This applies also to vehicles with a built in
battery disconnection switch.
Remember that only a well charged battery
can deliver the necessary energy to start the
engine. The condition of the battery should
therefore be checked regularly. The battery
is located in the back of the vehicle, and is
reached via a flap in the spare wheel well.
Before the battery is to be charged with a heavy
duty charger, it must be disconnected, or other-
wise the alternator can be destroyed.
The battery capacity is reduced by low tem-
peratures. However, during the winter months,
the demands made upon the battery increase
because of the need for more lighting, heating
fan, windscreen wipers etc. Therefore check,
especially when only making short journeys,
that all unnecessary electrical systems are
turned off.
75

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