I have a Dakota with 190k on it. The tachometer stopped working about 2 months back. Has anyone ever tried to fix one of these? I have not pulled the instrument cluster completely, but could do that. However, not sure what might be wrong.
The tachometer is driven by a small 'daughter' card that plugs into the main circuit board behind the instruments. It might have come loose, or just have failed. It's a poor design that draws battery power with the engine off. I rewired it to run off the ignition only.