Nothing yet don't want to mess anything up
Bad tach, seems .
bad tach, or bad wires to it or power to it bad.
i dont know what engine option you have
but most use the ignitor signal to do this.
later about 1996 the ECU uses CKP sensor to run the tach directly
in that case bad tach, bad wires to tach or bad power feed to it.
it only has 3 wires.
power
ground
sig
one is bad, or its bad.
SOURCE: 95 honda accord V6 tachometer jumping and cutting out.
I had the same problem with my 1995 Honda Accord V6 2.7L a year ago. It was a pain to have Honda diagnose the problem because it was intermittent and every time I took my car in to the dealership they said they couldn't reproduce the problem, but the longer you wait the more frequently your tachometer will fluctuate. I finally stopped by the dealership when the tachometer was jumping and they were able to diagnose the problem. In my case there was a faulty resistor in the ignition coil, but the entire ignition coil needs to be replaced. I don't know anything about cars but I know this fixed my problem. I went directly though Honda's service center so I know they charged me more than an independent repair shop but I'm looking at my invoice now and I paid $150 for the ignition coil and $200 for labor. After Honda diagnosed the problem I searched for "1995 honda accord ignition coil tachometer" and found that other people had the same problem and replacing the ignition coil was the fix. Hope this helps.
SOURCE: need to install tachometer 1991 toyota pickup
mine is a 1990, beleive it or not, it hooks to the negative side of your coil under the hood facing the front of your truck it will be on the right hand side, (black is ground and red is hot for the light)
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