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Yes there is. You simply twist the tachometer reset nob counterclockwise to dim.
One possibility is that the tachometer connections to the circuit board of the cluster have become corroded. It is also possible that the tachometer has just become worn out and needs to be replaced.
It is located on the left side of the transmission right next to the shift lever just above the oil pan. There will be a small vacuum line coming off of it.
If the tachometer only works a few times a year the VSS is malfunctioning. This can occur when oil is spilled on the unit and messes with the sensor. Cleaning the sensor will allow the tachometer to work properly.
Answer Check the window switches.
It depends on what is wrong with it.The tachometer takes input from the revolutions of the engine, so can you identify if the connection in the engine is okay, or if the connection to the actual guage(tachometer) on the dash is okay.A test would be to get a working instrument panel,replace yours and see if the rev-counter(tachometer) works. If it does then it might be cheaper to replace the whole instrument panel. If it does not then the problem might be in the engine, you might want an auto-electrician to trace the cables etc.
Remove the instrument panel cover. Remove the tachometer retaining screws. Remove the tachometer cable from the back of the tachometer. Reverse the process to install the new tachometer.
How do you remove a radio from a 190E?
you need a tachometer
Check your battery connections. If the terminals are good then check the starter.
The tachometer cable may be faulty. The tachometer sensor, on the side of the engine might not be functioning properly.
The Mazda tachometer and the speedometer have separate cables. The tachometer cable probably does not work properly. Change the tachometer cable.