The first thing to do is to dismantle the dashboard and find the food for the tachometer (for example, from hours).
In order to obtain a signal with engine speed information, connect to the left connector on the instrument panel to the 15th contact. Between 14 and 15, you have to install a resistor by 2-5 kOhm. The only way to do this is to gather everything in reverse order and choose a convenient place to install the tachometer.
