Ac power transistor honda civic12/4/2023 Yet, one of the most common symptoms of a defective blower motor resistor is when the motor gets stuck on one setting. You should be able to easily choose the setting you want the fan on. If your resistor reads differently, it’s time for a replacement Blower Motor resistor.Most of today’s heater and air conditioning systems come with multiple fan speed settings. The resistance here isn’t exact but it should be between the 1.4K and 1.5K range. If your Honda Civic Blower Motor Resistor is still good, it will read between 1,400 to 1,500 Ohms. Now you will be using your multimeter leads and probing pins C and D for resistance. Undo these bolts and gently remove your Civic blower motor. There are two bolts that hold your power transistor in place. The wiring schematic here shows you what pins you will be probing to measure the internal resistance. You are now looking at the front of the blower motor resistor. For this leg of our How To tutorial, you will need to turn your ignition to the “OFF” position. This is done through your multimeter by turning the dial to measure OHMs. Testing your Civic Blower Motor Resistorīecause the resistor is basically an adjustable power transistor, you can test the unit directly by measuring the pins for resistance. Make sure that you are testing just the blower motor side for this next section of our DIY tutorial. Now you will be testing the resistor portion of your blower motor. The rest of the Honda Civic wiring schematic works out to WIRE A which is a BLUE wire with a YELLOW stripe that provides the varying current to increase or decrease the fan speed. The last wire is WIRE D which is a BLUE wire with a BLACK stripe and that leads to the resistor for the base voltage. This wire in your blower motor should be for your chassis ground. The next wire to check is WIRE B which is a solid BLACK wire. This wire should be sending voltage from the control panel in your Honda Civic. You can do this with the engine started as well if you wish.ĭon’t forget that you are testing the ENGINE harness or car side of the connector. This wire runs to your heater control panel, and to activate this wire turn the climate controls on. The first wire you will be checking is WIRE C which is a BLUE wire with a RED stripe. Once you gain access to your blower motor connector, disconnect the harness and turn your ignition key to the ON position. You’ll be testing the pins using the Honda Civic blower motor wiring diagram below. This is plugged in behind your Honda Civic glovebox. Your resistor unit is connected by a four pin harness. When this happens you’ll be using this tutorial to test both sides of the blower motor equation. Eventually the Civic Blower Motor resistor will burn out, leading to partial or complete failure of your climate control. The Civic blower motor uses this resistor to scale down the voltage or the speed of your air vents. Because the FA or FG Honda Civic chassis incorporates controls and climate control visuals into your dashboard, you are going to need to remove the glovebox to access your blower motor resistor. Namely the dash controls won’t respond, meaning your air vents will only work at one speed.
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