1. Product Overview
This 3-in-1 auto gauge kit provides essential vehicle information in a compact 52mm design. It includes a voltmeter to monitor battery health, a water temperature gauge to track engine coolant temperature, and a fuel level gauge to display fuel tank levels. Designed for universal application in 12V cars, trucks, and SUVs.
Figure 1: Various styles of the 3-in-1 Auto Gauge Kit.
Figure 2: Kit contents including the gauge unit, temperature sensor, and mounting hardware.
2. Specifications
| Feature | Specification |
|---|---|
| Gauge Diameter | 52mm |
| Operating Voltage | 12V DC |
| Functions | Voltmeter, Water Temperature Gauge, Fuel Level Gauge |
| Included Components | Triple Gauge Unit, Water Temperature Sensor, Mounting Hardware (nuts, washers) |
| Package Dimensions (approx.) | Length: 25 cm, Width: 10 cm, Height: 10 cm |
| Package Weight (approx.) | 0.439 kg |
| Special Features | Gauge |
| Country of Manufacture | China |
3. Installation and Wiring
Important: Professional installation is highly recommended. Disconnect the vehicle's battery before beginning any electrical work to prevent short circuits or damage.
3.1 General Wiring Diagram
The following diagram illustrates the general wiring connections for each gauge. Ensure all connections are secure and properly insulated.
Figure 3: Detailed wiring diagrams for the individual gauges and fuel level sensor installation instructions.
Voltmeter (GV-520) Wiring:
- RED wire: Connect to Ignition Switch 12V (+).
- BLACK wire: Connect to Battery (-).
- TO BATTERY (-): Connect to vehicle ground.
- TO IGNITION SWITCH 12V (+): Connect to switched 12V power source.
Water Temperature Gauge (GT-520) Wiring:
- RED wire: Connect to Ignition Switch 12V (+).
- BLACK wire: Connect to Battery (-).
- TEMP SENSOR: Connect the green wire from the gauge to the temperature sensor.
- TO BATTERY (-): Connect to vehicle ground.
- TO IGNITION SWITCH 12V (+): Connect to switched 12V power source.
Fuel Level Gauge (GF-520) Wiring:
- RED wire: Connect to Ignition Switch 12V (+).
- BLACK wire: Connect to Battery (-).
- FUEL SENSOR: Connect the green wire from the gauge to the fuel sensor.
- TO BATTERY (-): Connect to vehicle ground.
- TO IGNITION SWITCH 12V (+): Connect to switched 12V power source.
3.2 Fuel Level Gauge Sensor Installation Instructions
Assembly Procedure: (Be careful of safe operation)
- Empty the fuel tank completely.
- Remove any old fuel sensors from the tank.
- The length of the 'a' and 'B' components of the new oil volume sensor must be adjusted using the values provided in the table below to properly accommodate your specific fuel tank depth.
- Adjustment of length 'a' is done by cutting the floating arm.
- To adjust length 'B', loosen the Bushing screw and adjust the shaft to the specified length before tightening. Rotate the pivot assembly to ensure the floating arm can move freely when placed in the tank.
- Install the adjusted fuel volume sensor into the fuel tank. Place gaskets at the installation holes in the fuel tank, tighten all fasteners securely, and then reload the fuel.
Fuel Level Sensor Adjustment Table:
| TRANSMITTER DEPTH" | A | B | TANK DEPTH" | A | B |
|---|---|---|---|---|---|
| 5 | 2 11/16 | 2 5/8 | 16 1/2 | 10 5/8 | 8 3/8 |
| 5 1/2 | 3 | 2 7/8 | 17 | 11 | 8 5/8 |
| 6 | 3 3/8 | 3 1/8 | 17 1/2 | 11 5/16 | 8 7/8 |
| 6 1/2 | 3 11/16 | 3 3/8 | 18 | 11 11/16 | 9 1/8 |
| 7 | 4 1/16 | 3 5/8 | 18 1/2 | 12 | 9 3/8 |
| 7 1/2 | 4 3/8 | 3 7/8 | 19 | 12 | 9 5/8 |
| 8 | 4 3/4 | 4 1/8 | 19 1/2 | 12 11/16 | 9 7/8 |
| 8 1/2 | 5 1/8 | 4 3/8 | 20 | 13 1/16 | 10 1/8 |
| 9 | 5 1/2 | 4 5/8 | 20 1/2 | 13 3/8 | 10 3/8 |
| 9 1/2 | 5 13/16 | 4 7/8 | 21 | 13 3/4 | 10 5/8 |
| 10 | 6 3/16 | 5 1/8 | 21 1/2 | 14 1/16 | 10 7/8 |
| 10 1/2 | 6 1/2 | 5 3/8 | 22 | 14 7/16 | 11 1/8 |
| 11 | 6 7/8 | 5 7/8 | 22 1/2 | 14 3/4 | 11 3/8 |
| 11 1/2 | 7 3/16 | 5 7/8 | 23 | 15 1/8 | 11 5/8 |
| 12 | 7 5/16 | 6 1/8 | 23 1/2 | 15 7/16 | 11 7/8 |
| 12 1/2 | 7 7/8 | 6 3/8 | 24 | 16 13/16 | 12 1/8 |
| 13 | 8 1/4 | 6 5/8 | 16 1/2 | 16 3/16 | 12 3/8 |
| 13 1/2 | 8 9/16 | 6 7/8 | 25 | 16 1/2 | 12 5/8 |
| 14 | 8 15/16 | 7 1/8 | 25 1/2 | 16 13/16 | 12 7/8 |
| 14 1/2 | 9 1/4 | 7 3/8 | 26 | 17 3/16 | 13 1/8 |
| 15 | 9 5/8 | 7 5/8 | 26 1/2 | 17 1/2 | 13 3/8 |
| 15 1/2 | 9 15/16 | 7 7/8 | 27 | 17 13/16 | 13 5/8 |
| 16 | 10 5/16 | 8 1/8 |
Note: All measurements are in inches.
3.3 Mounting the Gauge Unit
The gauge unit is designed to be mounted in a standard 52mm (2-inch) opening. Secure the unit using the provided mounting bracket and hardware from the rear. Ensure the unit is firmly in place to prevent vibration.
Figure 4: Rear view showing wiring terminals and mounting points.
4. Operating the Gauges
Once properly installed and wired, the gauges will activate when the vehicle's ignition is turned on.
- Voltmeter: Displays the vehicle's electrical system voltage. A healthy 12V system should typically read between 12.0V (engine off) and 14.7V (engine running).
- Water Temperature Gauge: Shows the engine coolant temperature in degrees Celsius. Normal operating temperatures vary by vehicle but typically fall within 80-100°C (176-212°F).
- Fuel Level Gauge: Indicates the amount of fuel remaining in the tank, typically from Empty (E) to Full (F).
5. Maintenance
- Cleaning: Wipe the gauge faces and bezels with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the finish or clear lens.
- Connections: Periodically check all electrical connections to ensure they remain tight and free from corrosion.
- Sensor Integrity: Inspect the water temperature sensor and fuel level sensor for any signs of damage or leaks.
6. Troubleshooting
- Gauge Not Working: Check power and ground connections. Ensure the ignition switch is on. Verify the fuse in the circuit is intact.
- Inaccurate Readings:
- Voltmeter: Check battery and alternator health. Ensure good ground connection.
- Water Temperature Gauge: Verify the sensor is correctly installed and making good contact. Check for air pockets in the cooling system.
- Fuel Level Gauge: Re-check the fuel level sensor adjustment and wiring as per section 3.2. Ensure the sensor is not obstructed in the tank.
- Intermittent Operation: Often indicates a loose or corroded electrical connection. Inspect all wiring thoroughly.
7. User Tips
- Many users have praised the quality of this product. For optimal performance and safety, consider professional installation, especially if you are not experienced with automotive electrical systems.
- Ensure all wiring is properly routed and secured to prevent chafing or interference with moving parts.
- Before final installation, test all gauges to confirm they are functioning correctly.
8. Warranty and Support
For any issues or questions regarding your 3-in-1 Auto Gauge Kit, please contact the seller or retailer from whom you purchased the product. Keep your purchase receipt as proof of purchase.
A detailed user manual in PDF format may be available for download. Please refer to the product listing or contact the seller for access to the PDF manual: View User Manual (PDF)