Why is the motor not turning on?

<span><span>The power switch may not be the problem if a cordless drill stops turning on. Sometimes a bad drill motor can prevent the tool from starting, even if the switch is good. </span></span><br /><span><span>To determine the problem, the best method is to remove the switch and then hot-wire the drill motor to the drill's rechargeable battery to test it. If the motor checks out, then it's probably the switch. </span></span><br /><span><span>The steps for testing a drill motor .</span></span><br /><span><span>In addition to tools needed for dismantling the cordless drill, such as a drill/driver, <b>two</b><b> wires</b> are needed to connect the motor wires to the drill battery. </span></span><br /><br /><span><span><span style="text-decoration: underline;"><b><a></a></b></span>Hot-Wire Test a Drill Motor</b></span></span><br /><span><span><span style="text-decoration: underline;"><b><br /></b></span></span></span><br /><p><span><span>1. Remove the drill's battery and dismantle the drill.</span></span><br /><p><span><span>2. Disconnect the wires leading from the switch to the drill motor. Sometimes this means completely removing the switch. </span></span><br /><p><br /><p><span>3. Now that the motor is isolated from the switch, <b>connect </b>one of the <b>motor </b>wires <b>to </b>one of the <b>battery </b>contacts <b>using one of the two wires</b> set aside for this test.</span><br /><p><br /><p><span><span>4. <b>Connect </b>the <b>second wire </b>to the other battery contact. </span></span><br /><p><span><span>(<b><i>Note:</i></b> It does not matter which motor wire is connected to which battery contact. The orientation is not important because it is a DC motor and will only determine which direction the motor spins.)</span></span><br /><p><span><span>5. Hold the motor firmly in one hand, and then <b>complete </b>the electrical <b>circuit </b>between the battery and the motor by connecting the second wire to the the second motor wire.</span></span><br /><p><span><span><b>If</b> the <b>motor does <i>not</i> spin</b> once the second connection is made, <b>then the drill motor</b> <b>is most likely fried</b> and needs to be replaced. </span></span><br /><p><span><span>If the motor <b><i>does </i>spin </b>after completing the electrical circuit, that's a good indication that <b>the motor is</b> a <b>healthy </b>one. If the motor tests out OK but the drill is still having trouble starting up, the problem is most <b>likely </b>caused by <b>a faulty power switch</b>, not the motor.</span></span><br /><p><br /><span><br /> </span><br /><span><span>The power switch will have to be reconnected to the drill after the motor has been tested. It is important to reinstall the switch wires correctly after performing this test. </span></span><br /><span><span>The example drill used in this article has a very simple wiring configuration in its power switch. Drawing a switch wiring diagram is especially useful for switches with complicated wiring configurations.</span></span><br /><br /><span><span>If you're testing your drill's motor, chances are that some kind of part replacement is on the horizon. </span></span><span><span></span></span>