That is totally incorrect. the 2nd gen neon uses a multiple spark electric ignition system where if you were just to tap into the tac signal wire your RPMs will only read 1/2 of what they are suppose to be... In order to install an after-market tach ie Autometer or other sorts you have 2 options.
1. Send it back to the company and have it reprogrammed for 2cyl mode or
2. Get an MSD Tach Adapter Driver normally around 60 bucks.