![Volvo 1989 780 Owner'S Manual Download Page 53](http://html1.mh-extra.com/html/volvo/1989-780/1989-780_owners-manual_1047867053.webp)
1989 Volvo 780
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Switch off the air conditioning system.
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Stop the car and put the gear lever into position N.
Do not stop the engine!
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Increase the engine speed to approx. 2000 rpm (twice idling speed).
pg. 49 Points to remember
Electrical system
When replacing the battery or when carrying out work involving the electrical system, the following
should be observed:
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A battery connection to the wrong terminal will damage the diodes. Before connections are made,
check the polarity of the battery with a voltmeter.
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If booster batteries are used for starting. They must be properly connected to minimize The risk of the
diodes being damaged. For correct connection, see "Jump starting" section.
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Never disconnect the battery circuit (for example, to replace the battery) while the engine is running,
as this will immediately ruin the alternator. Always make sure that all the battery connections are
properly tightened.
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If any electrical-welding work is performed on the vehicle, the ground lead and all the connecting
cables of the alternator must be disconnected and the welder cables placed as near the welding point as
possible.
WARNING!
Do not drive with trunk lid open!
Poisonous exhaust gases may enter via the open trunk lid.
If the trunk lid must be kept open for any reason, proceed as
follows:
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Close the windows.
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Set heater control to
and switch the fan to max (5)
CAUTION: Driving through standing water
Drive slowly and carefully if going through standing water (i.e. flooded roadways, etc.). Damage to
engine could result if excess water is ingested through the air intake system. Never drive the vehicle in
water deeper than 1 foot (300 mm).
file:///K|/ownersdocs/1989/1989_780/89780_03.htm (10 of 20)12/30/2006 8:24:23 AM