I think alto will have a wire from the ECU to connect the RPM..
Here is what I did ..
http://www.theautomotiveindia.com/f...s/4537-aftermarket-tacho-meter-rpm-meter.html
Here is what I did ..
http://www.theautomotiveindia.com/f...s/4537-aftermarket-tacho-meter-rpm-meter.html