From a crankshaft speed/position sensor.
As far as what tachs will work: buy a tach that has what is called an "inductive" pickup. this is a clip that you put around a spark plug wire, it will give your tach the signal it needs from the engine. the rest of the basic instructions, even though they wont be for your exact car, will be in the package with the tach.
pump housing front top of engine
The tach signal comes out of the pcm. The pcm watches the crankshaft position sensor to calculate engine speed. The crankshaft position sensor is behind the starter.
theirs a green wire by distributer that is for the tach
Remote starters can use the AC signal from the alternator as an alternate signal which is not produced until the engine is running. On most cars if you access the PROPER wire for the tach it almost always is strong enough. Double check your wiring diagrams and make sure you are accessing the correct wire from the coil pak or ignition coils.
green wire on aftermarket tachs are the signal wire i belive
Tach signal wire is located at the PCM near the connector. Use the manual should there be need for help in locating it.
tach signal wire is a blue wire with a black cap that ends on the top of the strut tower near the firewall...done
Tach is driven by a motor signal, speedo is from the trans the sensor is bad on the transmission
All of the ones that I have worked on have the tach pickup made into the alternator, believe it or not. There are two different alternators that can go on this engine and they look the same from the outside and use all the same wires. They are delco-remy. I'll get you the part numbers.
pin 48 on the pcm connecter is tach signal connect to your green wire from tach
The instructions will come with the new tach.