I have a dental chair with a broken DC motor controller board. There are no identifying marks on the motor or the main controller board unfortunately.
The motor is connected to a large capacitor.
I want to make a circuit that will make the motor spin in both directions with a toggle switch.
Any direction you can give is appreciated.
Latch
if you get a DPDT switch (On-Off-On) and wire the 2 motor power wires to the middle pins of the switch, and then wire up + - to the top 2 pins, and then - + to the bottom 2 pins, you`ll have exactly what you need 
in the the Middle position the motor is Off.
in the Top position the motor gets + and - (forwards direction).
in the Bottom position it gets wired - and + (reverse direction).
hope that`s a little clearer, All the best and Happy New Year!
