Rpm gauge stop working

How do i fix my rpm gauge?

only thing I can suggest is checking the wires in the back to make sure there not broken and to make sure the plug didnt come out

Is anything else electrical not working? Cuz it could be the start of your alternator/battery goin, or maybe a blown fuse??? Did you try turning the car all the way (started and all) and then checking the rpm gauge, cuz although u may think it, when just the battery is on the rpm gauge doesnt move even if u hit the gas, its a common misconception. :D Maybe i dont know jack shiat, lemme know if this is true.

I had a similar problem when I switched out my speedo...I forgot to hook some wires up and it didn't work. Just check the wires to make sure they are all hooked up and if not then is anything else not working?

could be a short coming from the distributor to the ecu or the ecu to the tach.... use a voltmeter to see if you got power.......