Im not exactly sure where to put this, but im having an issue with my tach only. I completely tore down my truck to do a full frame up re-build and in the process of putting everythin gback together, i must have done something somewhere. All of my gauges work properly except the tachometer, it will not work at all, i have replaced all the stepper motors and it still will not work. Im clueless as to where i need to look next, can anyone point me in the right direction??