Hello, Have tried searching for an answer to my question to no avail. I have a '79 Berlinetta with the stock "idiot light" cluster. My pcb is in bad shape and I'd like to do away with it all together. I already have aftermarket temp and oil pressure gauges fitted into the stock cluster. I plan to wire some 194 twist in pigtails for lighting. I understand I will lose some of the cluster functions like idiot lights, high beam and turn indicators, not really worried about that so much. My question is in regards to the stock tach. The brown wire in the harness is supposedly the tach signal from what I read. There are 2 studs on the back of the cluster in the tach area that are marked "coil" and "12v" under the pcb. Can I wire the brown wire to the coil stud, and give 12v to the other and have the tach work without having to use the pcb (printed circuit board). Would I need to supply any type of ground to the cluster for the tach to work? I plan to do something similar with the stock fuel gauge and battery gauge, hardwiring them in. Any help or additional info would be appreciated.