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bench grinder

harley7316

New member
Joined
Oct 16, 2025
Messages
3
Hi was wondering was given a mastercraft bench grinder and the switch has been removed.there is 4 wires that went to the switch 2 red wires and to black wires.Like to test to see if grinder works but not sure how to tell which black and red wires go together any help would be great.Thanks in advance
 
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jayemm

Well-known member
Joined
Dec 18, 2018
Messages
1,531
Location
up high down low
Hi was wondering was given a mastercraft bench grinder and the switch has been removed.there is 4 wires that went to the switch 2 red wires and to black wires.Like to test to see if grinder works but not sure how to tell which black and red wires go together any help would be great.Thanks in advance
In cases like this it would help if you posted a picture or two.
 
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harley7316

New member
Joined
Oct 16, 2025
Messages
3
I have 2 red wires coming from motor and and the 2 blacks is coming from cord.I assume if connect black to red and black to other red that would be like there is no switch.Does it matter which black goes to which red?IF so how can i tell?Thanks
 

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