2-16
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Find the plug-in receptacle (either behind the front
bumper or in the component box).
3. Plug a heavy-duty, three-prong extension cord
(rated for at least 15 amps) into the vehicle’s plug
-in
receptacle first. Then plug the extension cord into a
normal, grounded 110-volt AC outlet.
CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the wrong
kind of extension cord could overheat and cause
a fire. You could be seriously injured. Plug the
cord into a properly grounded three
-prong
110
-volt AC outlet. Use a heavy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug
the cord.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature.
Above 32
_
F (0
_
C), the coolant heater is not required.
From 32
_
F to
-10
_
F (0
_
C to -23
_
C), keep the coolant
heater plugged in at least two hours. Below
-10
_
F
(
-23
_
C), keep the coolant heater plugged in for a
minimum of eight hours or overnight. It will not harm
either the coolant heater or the vehicle to leave the
coolant heater plugged in longer than the times stated.
Be sure to remove and store the cord before starting the
engine. See “Diesel Fuel Requirements and Fuel
System” in the Index for information on what fuel to use
in cold weather.
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