2000 Mitsubishi Mirage OEM Tachometer

it could simply be dusty old. try removing the tachometer by disassembling it from the dashboard... clean the fuses, the wires, and while your at it probably clean the other devices as well lol. it is also possible that some fuses are already dead... the thing with the 2000 mirage is that some of the fuses and wires are sort of parallel. sometimes when one device stops working, another device stops working with it.