Question about Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451

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Model 6312D Makita drill wiring

How do I wire up a new switch?

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Re: model 6312D Makita drill wiring - Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451 Drills &...

Just follow the all switch connection

Posted on May 29, 2008

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My Makita impact driver led light stays on soon as the battery is clicked in. Any idea whats wrong and how I can fix it?

the light is normally activates by the trigger, so either the switch has gone faulty or the wires running to bulb are contacting.
press the helpful button and check link below

Makita BTD142 Trigger Switch Replacement

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1 Answer

Variable speed not working, the trigger is either full on or off. speed switch 1 or 2 works

Replace the switch because a power mosfet inside is defect

650583-6 look for that switch partnumber also ferify it because this is for the model in the netherlands but most time its the same by Makita and its not to expensive will succeed to replace succes. but be careful when pulling out the wires using a thin watch screwdriver to push the unlock holes next to the connector contacts.

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Things I've run across in my shop to check for:
1. Is power getting out of the switch to the motor. It is possible for the part that powers the light to work and not the part that goes to the motor
2. Is the armature jambed by something that doesn't belong in there so it can't turn.
3. Is the armature burned up. Check the wires for burn spots, broken wires or discoloration of the windings, they should be the color of a new penny.

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Jan 16, 2012 | Makita Drills & Drill/Drivers

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Wiring diagram for HP1501 using 6519867 switch Replacing old switch with 6519867. Different terminals from old one.Like to find a wiring diagram so I can install it... Thanks, Les

Makita doesn't furnish online schematics for replacement parts, BUT you can call their tech department and they should be able to send one as a PDF. Call them at 1-800-4625482. They do have one online for the original switch at "" but not the replacement. Let me know if you need more assistance.

Apr 10, 2011 | Makita Drills & Drill/Drivers

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I have an older basic makita cordless drill worked fine until now battery charged and it doesnt work. charged again. still nothing- except the built in light on the drill lights up weird

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.

Aug 15, 2010 | Makita Drills & Drill/Drivers

1 Answer


if the brake doesn;t work the switch need to be replaced, go to and with your model number you can buy a replacement switch, make note of the wiring the switch is polarity sensitive.

Dec 16, 2009 | Makita Drills & Drill/Drivers

1 Answer

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I would suggest going to the Makita site and downloading a breakdown for this tool first. The switch replacement is not that difficult to do. If you are comfortable with taking the tool apart to look for debris (possibly pieces of fan) that would restrict movement. Sometimes if it breaks pieces get behing the trigger and won't allow it to shift, if it is broken you need a new motor. Pay close atttention to the wiring it is polarity sensitive and if nott rewired correctly will burn up a new switch. Hope this helps but like I said it is not that a major repair if you just take your time and watch how things come apart.

Dec 26, 2008 | Makita 3/8" Dr. 14.4V Cordless Drill Kit

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Makita electric drill

the header lists 2 different tools but if you give me the model number I will find a cord set for you and the wiring diagram that you need. If you also give me the area (US only) I will try and find someone local that has what you need.

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