1. Introduction
The AUTO Meter 9117 Tachometer Adapter is designed to enable the use of any standard Auto Meter ignition tachometer, Pro-Shift Lite, or RPM activated module with vehicles equipped with distributor-less ignition systems. This adapter is particularly useful for late-model vehicles featuring coil-over-plug ignition systems or other configurations where a direct tachometer output or signal wire is not readily available.
Image 1: The AUTO Meter 9117 Tachometer Adapter. This compact black unit is designed to convert ignition signals for tachometer compatibility.
2. What's Included
- AUTO Meter 9117 Tachometer Adapter
- Basic Installation Hardware (e.g., connectors, mounting screws)
- Instruction Manual
3. Setup and Installation
Proper installation of the AUTO Meter 9117 Tachometer Adapter is crucial for accurate tachometer operation. This adapter converts the ignition signal from a distributor-less ignition system into a usable RPM signal for your tachometer.
3.1 General Wiring Overview
The adapter typically requires connections for power, ground, an ignition signal input, and a tachometer output. Always refer to the specific wiring diagram included with your adapter for precise connections.
3.2 Connecting to a Coil-Over-Plug System
- Identify Ignition Coil: Locate one of the ignition coils in your vehicle's engine bay. For coil-over-plug systems, these are typically found directly on top of the spark plugs.
- Tap into Ignition Signal: The adapter needs to tap into the primary ignition signal wire of one of the coils. This wire carries the pulse signal that the adapter converts. Consult your vehicle's service manual or a reliable wiring diagram to identify the correct wire.
- Power and Ground: Connect the adapter's power wire to a switched 12V power source and the ground wire to a reliable chassis ground point.
- Tachometer Output: Connect the adapter's tachometer output wire to the RPM input terminal of your Auto Meter tachometer.
Image 2: Example of a passenger car ignition coil. The adapter connects to the primary ignition signal wire of one of these coils.
3.3 Video Demonstration: Tachometer Adapter Installation
Video 1: This video demonstrates the installation process of a tachometer adapter on both a passenger car ignition coil and a motorbike ignition coil, illustrating the connection points for the RPM signal.
3.4 Video Demonstration: Tachometer Adapter with Digital Dash
Video 2: This video showcases the AUTO Meter 9117 Tachometer Adapter providing an RPM signal to a digital dashboard in a Coyote engine application, demonstrating its functionality.
4. Operating the Adapter
The AUTO Meter 9117 Tachometer Adapter operates automatically once correctly installed and powered. It continuously converts the ignition signal into a stable RPM signal for your connected tachometer or RPM-activated device. There are no user-adjustable settings on the adapter itself.
5. Maintenance
The AUTO Meter 9117 Tachometer Adapter requires minimal maintenance. Periodically inspect all wiring connections to ensure they are secure and free from corrosion or damage. Ensure the adapter unit is mounted in a location protected from excessive heat, moisture, and physical impact.
6. Troubleshooting
- No Tachometer Reading:
- Verify all power and ground connections to the adapter are secure and receiving proper voltage.
- Confirm the ignition signal input wire is correctly connected to the primary ignition signal of a coil.
- Check the connection between the adapter's output and the tachometer's input.
- Ensure the tachometer itself is functioning correctly.
- Erratic or Inaccurate Tachometer Reading:
- Inspect all wiring for loose connections, frayed wires, or interference from other electrical components.
- Ensure the adapter is not mounted too close to high-voltage ignition components that could cause signal interference.
- Confirm the correct ignition signal wire was tapped.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | 9117 |
| Manufacturer Part Number | 9117 |
| OEM Part Number | 9117 |
| Item Weight | 7 ounces |
| Product Dimensions | 5 x 5 x 4 inches |
| Compatibility | Distributor-less ignition systems, coil-over-plug systems |
8. Warranty and Support
For specific warranty information regarding your AUTO Meter 9117 Tachometer Adapter, please refer to the documentation included with your purchase or visit the official AUTO METER website. For technical support or assistance with installation and troubleshooting, contact AUTO METER customer service directly.
9. Safety Warnings
CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Always ensure the vehicle's battery is disconnected before performing any electrical work to prevent injury or damage to the vehicle's electrical system.
