Where is the tachometer connected

Install a grommet in the firewall. It's a good idea to install a rubber grommet where the wire s pass through the firewall as part of your installation.

If the wires rub up against the bare metal, it can cause a fire hazard or at least a short. It's best to be on the safe side and work a grommet in, which will only cost a few dollars and take a few minutes at the most.

Set the shift light on the tachometer if applicable. This light will remind you that it is recommended to change gears at the current RPM. Not all tachometers have the shift light feature. If your chosen tachometer does, follow the installation instructions to properly set the shift light. The shift light cannot be set if the engine is running. Where do the three wires, red, green and black, connect for my electronic 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 0 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 It includes diagrams for common ignition systems, including those used by General Motors, Ford, and Chrysler plus many aftermarket manufacturers.

Thanks for your comment. We have a significant database of that information available and would be happy to assist you with any questions that you may have. Please give us a ring toll free at to speak with one of our knowledgeable technicians about your application. I know they are in line with the resistor wire Ford used back then but which color wire goes where?

I have a tachometer that calls for running to a W terminal on the alternator. It is a digital dispaly. Hi I have a 3 wire aftermarket tach that has ambiguously worded wiring directions. 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.

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 11 months ago. Sorry but there is no way that wire going through the fire wall could cause a fire.

It would only short out and blow a fuse. Question 2 years ago on Introduction. All we really want to know is where the wires go and it 'd be nice to have that clear up front before looking through all the lovely pics. In fact it is never clearly stated.

I don't think so anyway.