Blower motor resistor, Disconnect battery, remove glove box or cover, disconnect connectors, remove screws and resistor. Reverse for installation. Blower motor: Remove kick panel, disconnect connector, remove screws and motor. Replace if damaged. Reverse for installation. Rear blower motor resistor (Durango): Disconnect battery, remove panel, disconnect connector, remove screw and resistor. Reverse for installation. Rear blower motor: Discharge AC, disconnect battery, remove refrigerant line fitting, remove hoses, remove panel, remove air ducts, disconnect connectors, remove housing, disconnect motor connector, remove screws and motor. Reverse for installation. Replace O-rings, evacuate, recharge, and leak-test system. Check coolant level.