The green wire should be the ignition(-). Do not confuse it with the regular ground.
Check your manual where to find your diagnostic connector( the one they put a jumper on for smog check, and where the diagnostic codes are checked); it is usually in the engine compartment, or maybe under the steering wheel.It is usually covered by a cap that says DIAGNOSTIC. Somewhere in or around it there should be the IGN- hookup.
Some other possibility would be to check for the ignition- cable coming out of the distributor(that is if you have a distributor).
My 91 Toyota has both, but I hooked my tach to the IGN- right besides the diagnostic connector in the engine compartment.
WARNING; my tachometer says that when the tachometer is hooked up, never let the tachometer ground itself( it means it should never touch the chassis or any metal, and also that the cables going to the tach should be VERY WELL SHIELDED!!); otherwise it would ruin the coil of your car.
That also means be careful with the cable not getting frayed or where you place the screws if you hook the tach to the chassis.I would recommend hooking it to a plastic part of the console, or place it over a rug or rubber glove so that the tach does not touch ground(chassis).
Connect the green wire to the negative side of the coil.
To hook up an aftermarket tachometer to a 1994 Cavalier 2.2, you can connect the green wire from the tachometer to the negative side of the ignition coil. This will allow the tachometer to receive the signal it needs to accurately display engine RPMs. Be sure to consult your tachometer's manual for specific instructions on wiring.
The green wire from the tach goes to the negative side of the coil.
There should be a blue wire behind your original gauges. That's where you hook up your green signal wire
need to know where to hook coil wire is all i need to know.
You may not have a ground wire in your older housewiring. Hook it somewhere to the metal plate that holds the fan to the box.
Green wire on the distributor is the tachometer pick up. Green wire on the distributor is the tachometer pick up.
the green is the signal wire and it goes to the negative side of the ignition coil
It goes to the top wire on the coil, the one that usually has a cover over it.
The green wire goes to the negative side of the coil. The yellow wire is probably for a light in the dial. You'd want to connect it to a power source that comes on when the headlights are on. The red wire should be connected to a source that is live anytime the key is in the on position.
The green wire is supposed to go to the negative wire of the coil , that is usually a white wire, but make sure that the tachometer documents tell you to use the negative wire it is usually the white wire. If you have a test light hook the cramp to the negative of the battery and check the two wires if the light glows that is the positive, connect the green wire to the other wire it will be the negative. There are some that say to use the positive, ""PLEASE READ THE INSTRUCTION VERY CAREFULLY"" Or you could short out the coil and the igition module.
usually green