1. Product Overview
This Akozon 80mm tachometer is designed for automotive use, providing accurate engine RPM readings. It features a high-sensitivity sensor, a waterproof design, and customizable 7-color backlighting for enhanced visibility. The gauge measures 3.15 inches (80mm) in diameter, making it suitable for various vehicle dashboards.
2. Specifications
- Brand: Akozon
- Model: Akozontcbodupn69246
- Diameter: 80mm (3.15 inches)
- Features: Waterproof, 7-color backlight, high sensitivity
- Origin: China
- Package Quantity: 1
3. Setup and Installation
3.1 Unpacking and Component Check
Before installation, carefully unpack all components and verify that the following items are present:
- Akozon Tachometer Unit
- Wiring Harness
- Mounting Bracket
- Screws
- Adhesive Pads

This image displays all parts included in the package: the tachometer unit, mounting bracket, wiring harness, control unit, screws, and adhesive pads, ready for installation.

Close-up of the adhesive pads and other small mounting accessories provided for securing the tachometer in place.

A pair of screws included for attaching the tachometer's mounting bracket.
3.2 Mounting the Gauge
Select a suitable location on your vehicle's dashboard or steering column that provides clear visibility without obstructing your view of the road or other instruments. Use the provided mounting bracket and screws to securely fasten the tachometer. Ensure the mounting is stable to prevent vibration during driving.

This image provides a view of the tachometer from the rear, showing the robust casing, mounting bracket attachment points, and the entry point for the wiring harness.

This image shows the main wiring harness connected to the control unit, alongside the separate mounting bracket, illustrating how these components fit together.
3.3 Wiring Connections
Refer to the wiring diagram below and connect the wires to your vehicle's electrical system. Proper wiring is essential for correct operation.

This image illustrates the wiring connections for the tachometer. The red wire is for positive power, black for negative (ground), red and white for the light source, and green and yellow for signal input.
- Red Wire: Connect to a positive (+) 12V power source (e.g., ignition switched power).
- Black Wire: Connect to a negative (-) or ground point on the vehicle chassis.
- Red + White Wire: Connect to the vehicle's light source line (e.g., headlight switch or dashboard illumination circuit) for backlight operation.
- Green Wire: Connect to the RPM signal line. This is typically found at the negative terminal of the ignition coil, the ECU tachometer output, or a dedicated RPM signal wire.
- Yellow Wire: This is also a signal line, often used for specific functions or alternative signal inputs depending on the vehicle. Consult your vehicle's service manual for the correct RPM signal location.
Important: Ensure all connections are secure and properly insulated to prevent short circuits or electrical damage. Incorrect wiring can damage the gauge or vehicle electronics.
4. Operating Instructions
4.1 Power On and RPM Display
Once correctly wired, the tachometer will power on automatically when the vehicle's ignition is switched on. The needle will then display the engine's current Revolutions Per Minute (RPM).

The tachometer's front face, highlighting the RPM scale from 0 to 11 x 1000 RPM. It also shows the 'PEAK SET-2' and 'SET-1 RESET' buttons for configuration and data recall, along with the 'High sensitivity' feature.

A clear front view of the tachometer, showcasing its illuminated display and the RPM needle. The 7-color backlight feature is visible, enhancing readability.
4.2 Backlight Color Adjustment
The tachometer features a 7-color backlight. The buttons labeled "PEAK SET-2" and "SET-1 RESET" on the side of the gauge are used to adjust settings. Typically, one button cycles through the available colors, while the other might confirm a selection or activate a peak recall function. Experiment with short and long presses of these buttons to discover their specific functions for color selection and other settings.
4.3 Peak and Reset Functions
The "PEAK SET-2" button is generally used to view or set a peak RPM warning, while the "SET-1 RESET" button is used to reset recorded peak values or other configurable parameters. For detailed instructions on setting specific thresholds or utilizing advanced features, please refer to any supplementary documentation provided with your purchase or contact Akozon customer support.
5. Maintenance
- Cleaning: Keep the gauge clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the display or casing.
- Wiring Inspection: Periodically check all wiring connections to ensure they remain tight and free from corrosion. Loose connections can lead to intermittent readings or complete failure.
- Mounting Security: Verify that the tachometer is securely mounted. Excessive vibration can affect the gauge's accuracy and lifespan.
6. Troubleshooting
- Gauge Not Powering On:
- Check the positive (red) and negative (black) power connections.
- Ensure the vehicle's ignition is on and providing power to the red wire.
- Verify the fuse in the power circuit, if applicable.
- No RPM Reading or Incorrect Reading:
- Inspect the signal wire connections (green and yellow wires) to the vehicle's RPM source.
- Confirm that the RPM signal source in your vehicle is active and correctly identified.
- Some vehicles may require a specific type of signal or an adapter for accurate readings.
- Backlight Issues:
- Check the connection of the red + white wire to the vehicle's light source line.
- Ensure the vehicle's lights are on if the backlight is connected to the illumination circuit.
If you encounter issues that cannot be resolved using these steps, please contact Akozon customer support for further assistance.
7. Warranty and Support
Specific warranty details for this product are not provided in this manual. For information regarding warranty coverage, returns, or technical support, please refer to the documentation included with your purchase or contact the seller/manufacturer directly. You can often find contact information on the product packaging or the Akozon official website.
For additional support, you may visit the Akozon Brand Store on Amazon.