If you’re looking for accurate and reliable engine RPM measurement, a tachometer is an essential tool. One of the most popular tachometers on the market is the Sunpro Super Tach 2. This article will provide you with everything you need to know about wiring your Sunpro Super Tach 2, including a wiring diagram, frequently asked questions, and helpful tips.
Wiring Diagram
The Sunpro Super Tach 2 wiring diagram is relatively easy to follow. The tachometer requires a power source, a ground, and a signal from the engine’s ignition system. Here is the wiring diagram:
| Wire Color | Description |
|---|---|
| Red | Power |
| Black | Ground |
| Green | Tach Signal |
| White | Lighting |
The red wire should be connected to a switched 12V source. This can be a fuse in the fuse box or a wire connected to the ignition switch. The black wire should be connected to a good ground source, such as the battery negative terminal or a chassis ground point.
The green wire is the most important wire, as it carries the tach signal from the ignition system. On most applications, this wire should be connected to the negative side of the ignition coil. On four-stroke engines with distributor ignition, the green wire should be connected to the negative side of the ignition coil that fires the cylinders. On two-stroke engines with CDI ignition, the green wire should be connected to the CDI box’s tach output wire.
The white wire is optional and is used to connect lighting to the tachometer. This wire can be connected to the headlight switch or another switched power source.
Frequently Asked Questions (FAQ)
Q: How do I troubleshoot my Sunpro Super Tach 2 if it’s not working?
A: First, check to make sure the tachometer is properly connected according to the wiring diagram. If the wiring is correct, you can test the tachometer by connecting a test light between the green wire and a good ground source. With the engine running, the test light should flash on and off as the engine RPM changes. If the test light does not flash, the tachometer may be defective.
Q: Can I use the Sunpro Super Tach 2 on a diesel engine?
A: No, the Sunpro Super Tach 2 is designed for gasoline engines with distributor ignition or CDI ignition. It is not compatible with diesel engines or engines with electronic ignition systems.
Q: Can I connect multiple tachometers to one ignition coil?
A: No, each tachometer should be connected to its own ignition coil or distributor. Connecting multiple tachometers to one ignition coil can cause inaccurate readings and damage the tachometers.
Q: What is the accuracy of the Sunpro Super Tach 2?
A: The Sunpro Super Tach 2 has an accuracy of +/- 2 RPM up to 8,000 RPM. Above 8,000 RPM, the accuracy may decrease slightly. However, this level of accuracy is more than sufficient for most applications.
Q: Can I install the Sunpro Super Tach 2 myself?
A: Yes, the Sunpro Super Tach 2 is designed for easy installation and can be installed by anyone with basic electrical knowledge. However, if you are not comfortable working with electrical systems, it is recommended that you have the tachometer installed by a professional.
Tips for Installing the Sunpro Super Tach 2
Here are some tips to help you install your Sunpro Super Tach 2 properly:
- Make sure the tachometer is securely mounted to prevent vibration.
- Use high-quality wire connectors and make sure all connections are clean and tight.
- When connecting the green wire to the ignition coil, be sure to connect it to the negative side of the coil.
- If you are having trouble getting a signal from the ignition system, you may need to install a tachometer filter or adapter.
- If you plan to use the tachometer at night, connect the white wire to a switched power source so that the lighting only comes on when the headlights are on.
By following these tips and the wiring diagram, you can ensure that your Sunpro Super Tach 2 provides you with accurate and reliable RPM readings. If you have any questions or concerns about wiring your tachometer, consult the owner’s manual or contact Sunpro for assistance.
