93 Tach not working
I am having a problem with my tach. I have a 1993 Mustang 2.3L auto. About a year and a half ago my tach was reading half of its real value so I replaced the ICM and it worked flawlessly for a year. Then we did a transmission swap on it and it hasn't worked ever since. It just reads 0 all the time the needle never moves. I replaced the ICM again with a known good one from a spare car that I have and that didn't work so I thought it might be the actual tach so I replaced the gauge cluster with my spare one that is known to be good and still nothing. Does anybody have any suggestions on what to do because it is really confusing to me.
Thanks in advance!