If there is no voltage (+) on the DARK BLUE wire at the Blower Motor, Check voltage at the Ignition Switch DARK BLUE wire for voltage with Key On
If there is voltage on the DARK BLUE wire at the Blower Motor, Replace Blower Motor ResistorHere is Dodge procedures
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BLOWER MOTOR RESISTOR
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Remove the lower dash panel under the Steering ColumnRemove the Lower Steering Column CoverThis will expose the Ignition Switch wires that is plugged into the Ignition Switch