well basically everything like gas, temp, speed works but the rpm guage doesn't work. i checked if the needle was stuck, which it wasn't. i checked all the fuses on the car ( i know that wasn't necessary but i don't know the diagram ). they where fine. i checked the wiring to the cluster, everything seems to be plugged in right. don't know what else to do. it might just be busted. any suggestions...?

90 ef just incase it matters