Re: Where\'s the tach
The tach represents an unnecessary and avoidable parasitic load across the battery. The ignition switch makes some circuits live when in the on position, some of which are the fuel pump or fuel solenoid and headlights. Be sure to use an appropriate fuse. It is poor practice to knowingly leave a load across the battery. You should identify and use one of the key controlled circuits or disconnect it when not in use. I don't have your model tractor, what have owners of similar tractors done, he does ask knowingly?
All the best,
Martin