Install 4 wire tachometer

Green is tach signal wire, red is power typically ignition-related , black is ground. Not Helpful 1 Helpful My needle has gone all the way round to the stopper, how do I get it back to 0?

It should go back automatically to a low RPM if idle, and zero if off. If these do not occur, you may have a faulty tachometer. Not Helpful 1 Helpful 5. I have a '99 Saturn motor, fuel injected, no coil. Where do I hook up the green wire? You can hook it to the ignition module on most any fuel injected vehicle. Not Helpful 5 Helpful There are 3 wires on my meter -- red, black, and green.

Where does each wire go? Red- 12 volt power -- usually switched power from the ignition circuit. Black -- ground. Green -- signal wire, usually the - side of the coil or the "tach" lead on the distributer or ignition box.

Not Helpful 4 Helpful 6. All tachs come with manuals, or you can search on their home websites for information on your specific model car. It's a fairly basic project relative to engine tuning or suspension work. Not Helpful 2 Helpful 7. A 16 gauge is a good idea. These are more robust than the minimum gauge needed, but actually not much current is used by a tachometer. Not Helpful 1 Helpful 0. Include your email address to get a message when this question is answered.

By using this service, some information may be shared with YouTube. If you choose to mount the tachometer directly to the steering column, plan the drill hole mounting points carefully.

Avoid drilling in a way that will damage the interior steering column wiring or supports. Helpful 25 Not Helpful You Might Also Like How to. How to. My issue is with the green signal wire. However, I am using a Pertronix CDI box with no tach port but it does have a gray wire for the tach signal. Can I also spur the gray wire into the tachometer. Good nite I bought a 5 inch tach with shift lite And after we installed it the needle is not reading Right.

The car is — Nissan tiida supercharged impul version. Your email address will not be published. Your Website. Save my name, email, and website in this browser for the next time I comment. Note; When I was working on this project, I also installed a new stereo and rewired my instrument panel lights that had not been working.

I couldn't find anywhere possible to run the wire through the firewall to the distributor, so I drilled my own. Next I ran the wire through the hole to the distributor wire. Luckily the wire was the perfect length. I used a crimp on connector to make the connection easily. The only thing you need to remember is that the wires you tap and their fuses need to be able to support the extra power draw from the tachometer.

Once those connections are made, fire up the engine and make sure it works-mine did. Wrap up all the excess wire and hide it in the dash. Above is a picture of my finished tach. It looks and works great. Thanks for reading and please feel free to comment. You need to install a rubber grommet where the wire goes through the firewall so it doesn't cause a short. The way you are running it is dangerous it could start a fire if the wire were to short out. Reply 1 year ago. Adjust the tachometer for the number of cylinders in your engine.

But if that engine has four coils or one coil for each cylinder then the reading will be accurate. Light bulb 12 volt g e. Mine was salvaged from my old truck 3m quick splice connectors 14 18 gauge 4 10 walmart tools. Installation operation instructions 1 parts list these instructions. Tachometer can be purchased from most any auto parts store for as low as Pin On Wiring.

Pin On Tachometer.