Chrysler 300M Service Manual page 280

8F - 16 BATTERY SYSTEM
BATTERY HEATER BLANKET (Continued)
The heater blanket cannot be adjusted or repaired.
If the blanket is faulty or damaged it must be
replaced.
OPERATION
The temperature of the battery can affect battery
performance. Only DAIMLERCHRYSLER approved
battery blanket/block heater combination should be
used. The battery blanket heater is designed to pro-
vide optimum charging system performance in very
cold ambient temperatures below -17.8°C (0°F).
DIAGNOSIS AND TESTING - BATTERY HEATER
BLANKET
(1) Remove the battery heater blanket from the
battery (Refer to 8 - ELECTRICAL/BATTERY SYS-
TEM/THERMAL GUARD - REMOVAL).
(2) Clean the battery heater blanket with baking
soda solution and wipe dry.
(3) Inspect blanket for cuts, abrasion or other
damage. If heater is damaged replace.
(4) Position the heater flat and re-connect the
blanket heater to the vehicles electrical system.
(5) Connect the 110 volt AC power cord to 110 volt
source for a maximum of 3 minutes.
(6) Disconnect the 110 volt power cord.
(7) Immediately feel the heater blanket on the
inside, it should be warm to the touch. If warm the
heater is OK, if not OK proceed.
(8) Disconnect the heater blanket from the vehicles
electrical system. Using an Ohmmeter, connect the
leads across the two wire terminals coming from the
heater blanket. A resistance value of 220 to 280 ohms
should be present. If not replace the blanket. If OK
proceed.
(9) Ensure that the 110 volt AC power cord is sup-
pling voltage to the heater blanket. If OK replace the
heater blanket. If not verify the 110 volt AC power
from another source. Inspect the power cord for dam-
age and replace if necessary.
REMOVAL
(1) Remove the battery and the battery heater
blanket from the battery tray as a unit (Refer to 8 -
ELECTRICAL/BATTERY
REMOVAL).
(2) Carefully slide the heater blanket straight off
the battery case (Fig. 10).
INSTALLATION
(1) Clean and inspect the battery heater blanket.
(2) Install the battery heater blanket on the bat-
tery case.
(3) Install the battery and the battery heater blan-
ket into the battery tray as a unit (Refer to 8 -
ELECTRICAL/BATTERY
INSTALLATION).
LH
SYSTEM/BATTERY
SYSTEM/BATTERY
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