
In case you have been wondering how eletric aftermarket speedometers work..

This dude comes in the gearbox instead of the speedo cable. It has just a drive pin like a speedo cable, I think it spins a hall trigger of some sort and you just wrench it in. Then connect +/-12v and connect the signal cable to the:

..gauge. Then it's good to go.
You adjust this model conventionally aka change the color coded drive gears inside the gearbox.
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