Blower motor, resistor how it works, symptoms, problems, testing
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If you are able to reach the blower motor and remove and install new motor without removing this, go for it. Removal is found in Section MTC Page 74. 9. Remove the Blower Motor. The Blower Motor is towards the top of the dash and towards the center of the car.. Blower motor wiring diagrams for three or four-speed systems. Carmakers use these three common wiring methods to supply power and ground to the blower motor in a manual system using a blower motor resistor. In one design, the carmaker supplies battery power to the speed switch, which switches the power to the appropriate connection on the.
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It might be a bad blower motor resistor / fan control amplifier, I would try replacing that first before the blower motor itself. You can purchase an aftermarket one for as low as $15 shipping included. OEM Nissan are probably around $100. Or you can test the blower motor resistor with an ohmmeter, there are some youtube videos on how to do this.. Before diving into wiring diagrams, it's important to understand the role of the blower motor resistor in a vehicle's HVAC system: • Speed Control— The blower motor resistor adjusts the speed of the blower motor by varying the electrical resistance in the circuit. Different resistance levels correspond to different blower speeds.
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