Introduction
Use for a diagnosed wiring problem.
Tools
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            Remove the backplate. 
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            Using a Torx T20 screwdriver, remove the four screws attaching the back plate. 
 
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            Remove the drill handle. 
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            Using the Phillips #2 screwdriver, remove the five screws attaching the drill handle to the body. 
 
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            Remove the gear casing from the body. 
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            Using the Philips #2 screwdriver, remove the four screws attaching the gear casing to the body. 
 
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            Use a multimeter set above 18V DC to check electrical connections where wires meet drill, switch, or battery terminal. 
 
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            Look for corrosion or burnt wires. 
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            If there are any bad connections or if there is visible damage, replace damaged wire and solder. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.