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The Electrical System
In cold weather, the battery loses about half its strength while the demands
on the battery increase. Oil is thicker so the engine doesn't turn over as
easily.
Other drains on the electrical system: driving with the lights on, greater
use of the heater blower, defrosters, and electric window defrosters.
Windshield wipers and washers work overtime.
Be sure your battery cables and connections are in good condition. Have the
charging circuit checked if you've noticed the battery getting weak.

Under cold conditions the demands on the electrical system may reduce the
voltage available from the ignition system while the voltage required to
fire your spark plugs increases. This causes "ignition bankruptcy": no spark
at the spark plugs and the engine won't start.
All components of all systems must be In good working order to ensure
dependable starting and performance.
Sometimes something as simple as corroded battery cable connections or a
loose alternator belt will cause the symptoms of a weak battery.
Be sure your trouble is not in the starting mechanism itself which, again,
can act like a dead battery.
TIP: The greatest percentage of emergency road
service calls come when the first severe cold snap hits.
Don't be a statistic: be prepared
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