I reset my ecu a while back by unplugging the ground on the battery for about 30 minutes and before then my speedo and everything else worked as it should, after I reattached the ground all the gauges takes a few minutes to start working and now my tach will work for a second then drop to 0 while the jeep is idling. Any ideas how to fix it or what could be wrong?

 

Is it just the tach that isn't working now? I would say check the fuses but if they blew more of the cluster would not work I would assume. At least that was what happened with mine.

 

Now none of the gauges at all are working, I've been trying to fid a fuse diagram and can't find one anywhere online