RPM tach quit working

[xporter]

Hey guys my rpm tach quit working on me. It was after I replaced the negative cable on my battery. Any suggestions?

 

[Euphoric306]

make sure you hooked up all your grounds, because thats what it sounds like

 

[BLOWN 5.0 FOX]

also check the fuse under the dash- as well as ground going to both the block and fenderwall (for ECU) . GOOD LUCK

 

[xporter]

Thanks guys. I was thinking it has to be a ground. I'll check it out.