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If you are ABSOLUTELY certain that the batteries are good then the only other culprit has to be the switch that feeds power to brushless motor. Also check battery contacts for corrosion.
<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>
Dear Chris Kelliher, Hi,
According to your explanation, i guessed that the electronic circuit for driving the motor of drill, has gone off. In such a case, the motor is either driven under variable frequency drive system, Power transistor (FET, IGBT may be used) or SCR control circuit. under the cover of drill there is an electronic circuit, which may be damaged. It should be rectified by some technical expert. here is a link of services provider, https://www1.milwaukeetool.com/PartsAndService/Repair/Default.aspx?chrome=false
If you are unable to reach the service center just download the form from the link above an fill it and shipped your part to the related company with free shipment. If you can check it personally then check it. i will guide you whatever possible. Service Milwaukee Tool
First before you open the tool ground yourself. The switch is probably static sensitive. Now open the tool and check for wires that may have come loose from the switch, or motor brush area. If no bad wires make sure the switch terminals are ok (not broken or bent and are tight enough to make contact with the batery terminals). Next check the brushes and make sure they move freely in the brush holders. You didn't state the model so it may not have brushes you can access. If all that is good disconnect the motor from the switch and secure the motor in a vise. Take wires with alligator clips and connect the battery directly to the motor for just a second to see if it runs. If the motor runs you have a bad switch assuming your battery is charged.
if the battery show good on the charger and you have a light i would check the switch. you can do a hot wire connection to check it. you need you battery and two wire connedtors. disconnect your switch and hook your battery straight to the motor. if the motor turns it is your switch. if not, that's bad, probably the motor is gone.
Check for power at the on switch. The switch on this machine should be electrical so yes it could go out. If it is not the electrical type then I would check to make sure that the internal switch did not brake or go bad.
You have burned out the drill motor, it is shorted, the battery smoked due to a direct short, one thing I don't understand why the thermal limiter didn't trip in battery pack, I would contact manufacturer and try to get hem to buy you a new drill.
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