1999 Chrysler 300M Logo
Posted on Jan 15, 2010
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Well on my 300m the heater and a/c dont turn off even if i press the off button

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  • Master 312 Answers
  • Posted on Jan 15, 2010
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Joined: Sep 08, 2009
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If you have the automatic controls you'll need to replace the blower power module behind the glove box.

1) Disconnect and isolate the battery negative
cable.
(2) Open the glove box.
(3) Flex both sides of the glove box bin inward near the top far enough for the rubber glove box stop bumpers to clear the sides of the glove box opening then roll the glove box downward.
(4) Reach through the glove box opening to access and disconnect the instrument panel wire harness connector for the power module from the module con-nector receptacle.
(5) Reach through the glove box opening to access and disconnect the blower motor pigtail wire connec-tor from the power module connector receptacle.
(6) Remove the two screws that secure the power module to the evaporator housing.
(7) Remove the power module from the evaporator
housing.

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1. Connect pin 1 of the 16-way data link connector to chassis ground or to pin 4 of the 16-way data link connector.
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3. Turn ignition key to Accessory.
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