The tachometer cable may be faulty. The tachometer sensor, on the side of the engine might not be functioning properly.
A bad ignition coil can cause your 1987 Acura tachometer to quit working. A bad tachometer cable or ground wire can also cause it to quit working.
To repair the tachometer on a 1996 Acura Integra LS with a B18B1 engine, first check the wiring and connections at the tachometer and the engine's distributor to ensure they are secure and free of corrosion. If the wiring is intact, test the tachometer itself by removing it and connecting it to a known working power source to see if it functions. If it still does not work, consider replacing the tachometer with a new or refurbished unit. Additionally, inspect the engine's ignition system, as issues there can also affect tachometer readings.
It is important to know what causes things to stop working within a car. A blown fuse or bad wiring can cause the key and headlight chime to stop working.
Possibly the Blower Motor has stopped working. This was the case in my 1994 Acura Legend. I just replaced it, and now the heat works great again!
Acura Legend was created in 1986.
it's the blower motor
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The tachometer on a 1991 Acura Integra is wired through the dash. To reach the wiring remove the dash console and pull out the tachometer. There the wiring can be worked on using a spark tester to find the bad wire and solder unit to replace the wire.