Answer: There are 3 (maybe4) wires on your tachometer. One +, one - and one gives the signal to the rpm. You must connect this third wire to the ECM (ECU) rpm outlet (White wire) or directly to the ignition coils negative wire (blue - yellow) If there is a fourth wire on the rpm, that is the backlight. Connect it to the dashboards backlight system.
Answer: Eat a balanced diet and insure you drink lots of liquids. Lack of fiber is a major challenge to staying regular as is dehydration.You can also drink one small glass of really good prune juice, daily. its very good for you and that would take care of it im sure; if not, then you should see a doctor.
Answer: A ac tach usually works off the AC signal of the alternator on a bus or truck.The alternator produces AC power that is rectified to make DC current to run the car, truck or bus.There is a TACH terminal or in North American buses more than 10 years old it is called a stator tap.The AC voltage changes speed (frequency) with the engine and the Tachometer reads that as a signalEarly or inexpensive ones are actually run on the AC current.
Answer: It works the same way a car tach works. It measures engine revolutions electrically from the coil/distributor or from a crankshaft sensor that is usually magnetic. On jet engines it is measured from the constant speed drive and is measured in percent of total power available rather than rpms.
Answer: The tachometer measures the number of revolutions the engine makes in a minute. This indirectly equates to the speed of the vehicle.
Depending on the gear that the vehicle is in, you could determine speed with a tachometer. To determine your speed, you would need to know the gearing of the rear end as well as the circumference of the wheels.