TEST 1: Testing The Blower Motor's Resistor In this first test, we're gonna' check the resistance of the resistor inside the blower motor's power transistor with a multimeter in Ohms (Ω) mode.If the resistance IS NOT within specification, we can conclude your Honda Civic's blower motor power transistor is bad and needs to replaced. With just a multimeter, you can find out if it’s time to get a replacement. With an ohm meter I check continuity while spinning the squirrel cage by hand. The white wire is called the run wire. These resistance tests are also known as continuity tests and are done with your multimeter in ohms mode. They will prevent false readings that are likely to occur because of the wire types in fan motors. You will next need to determine the rated value of the resistor. Now it does not work at all. To test a resistor or motor, you’ll need to know the basics of electrical circuitry and have access to a multimeter and the proper electrical specifications for the involved circuits. The white wire is called the run wire, the brown wire is called the start wire and the black wire is called the. Values measured in this step should be around point one or point two ohms. 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