Tachometer not reading? What the heck?

[asiandude15]

So I put a JDM gauge cluster in an S13 and on the old cluster the tach was not working and I figured it must be the cluster so I replaced it with a JDM one, that I tested on a different car, and it worked perfectly fine. I put in in the car and everything works but the tach still does not work. What could be the problem?

[xamraci]

welcome to owning a nissan S chasis...mine works off and on...as far as I recall the signal comes from the ECU...could be that or could be a million and one things wiring related:-/

[asiandude15]

I actually don't own an S chassis. LOL I just work on alot cars. I am saving up to buy an s13 hatch though. But damn I knew it was wiring but I didn't know exactly what. Got any idea's where I should start?