1. Product Overview
The EARU Rocker Switch Panel is a versatile and durable control solution designed for various 12V/24V applications, including marine vessels, trucks, cars, RVs, and buses. It features multiple illuminated rocker switches, a cigarette lighter socket, and dual USB charging ports, all integrated into a robust, waterproof, and dustproof panel. This manual provides essential information for the safe and effective installation, operation, and maintenance of your switch panel.
Key Features:
- Available in 3-gang and 4-gang configurations.
- Pre-wired harness for simplified installation.
- Input voltage compatibility: DC12V/24V.
- Output voltage: 5V for USB charging.
- High/low temperature resistant, flame-retardant ABS, PC, and PBT materials.
- IP68 protection level for complete waterproof and dustproof functionality.
- LED constant brightness for easy switch location in low light conditions.
- Integrated cigarette lighter socket and dual USB ports for powering external devices and charging mobile electronics.
2. Specifications
| Attribute | Value |
|---|---|
| Product Material | ABS, Aluminum Plate, PC, PBT (Flame-retardant) |
| Switch Light Color | Blue (also available in Green, Red) |
| Product Color | Black |
| Working Temperature | -25 ℃ to 80 ℃ |
| Maximum Power | 240W |
| Input Voltage | DC12V/24V |
| Output Voltage (USB) | 5V |
| Output Current | 3.1A (USB), 10A, 20A (Switches) |
| Protection Grade | IP68 (Waterproof & Dustproof) |
| Voltage Meter Detection Range | 6-30V |
| Net Weight | Approx. 0.19kg (220g) |
| Product Size (4-Gang) | 13.4 cm (L) x 6.8 cm (W) x 5.5 cm (H) |
| Opening Size (4-Gang) | 12 cm (L) x 6 cm (W) |
| Product Size (3-Gang) | 9.6 cm (L) x 6.6 cm (W) x 3.8 cm (H) |
| Opening Size (3-Gang) | 8.6 cm (L) x 6.6 cm (W) |
| Mechanical Life | 100,000 cycles |
| Electrical Lifespan | 100,000 cycles |
| Contact Resistance | ≤50 mΩ |
| Insulation Resistance | ≥100 MΩ |
| Origin | Mainland China |
3. Setup and Installation
The EARU Rocker Switch Panel is designed for straightforward installation in a variety of vehicles and marine applications. It comes with a pre-wired harness to simplify connections.
Before Installation:
- Ensure the vehicle's power is completely disconnected to prevent electrical shock or damage.
- Choose a suitable mounting location that is flat, accessible, and allows for proper wiring. Consider the dimensions of the panel (refer to Specifications).
- Gather necessary tools: drill, hole saw (or jigsaw), screwdriver, wire strippers, crimping tool, electrical tape, and appropriate fasteners.
Installation Steps:
- Measure and Mark: Use the provided dimensions (e.g., 12cm x 6cm for 4-gang, 8.6cm x 6.6cm for 3-gang) to mark the cutout area on your chosen mounting surface.
- Cut the Opening: Carefully cut the marked opening. Ensure the edges are smooth and free of burrs.
- Prepare Wiring: The panel comes pre-wired. Identify the main positive (+) and negative (-) input wires. The individual switch output wires are typically color-coded (e.g., red for positive, black for negative) and terminated with spade connectors.
- Connect Power Input: Connect the main positive (+) wire from the switch panel to a fused 12V/24V power source (e.g., battery or fuse block). Connect the main negative (-) wire to a reliable ground point.
- Connect Accessories: Connect the positive (+) wire of each accessory (e.g., headlights, fog lights, LED bars) to the corresponding output wire of a rocker switch. Connect the negative (-) wire of each accessory to a common ground point.
- Mount the Panel: Insert the switch panel into the cutout. Secure it using the provided screws or other suitable fasteners.
- Test Functionality: Reconnect the vehicle's power. Test each switch, USB port, and cigarette lighter socket to ensure they function correctly.
Wiring Diagram Example:

Figure 1: 4-Gang Switch Panel with dimensions and pre-wired spade terminals. Note the input/output wiring for each switch.

Figure 2: 3-Gang Switch Panel with dimensions and pre-wired spade terminals.
Application Scope:

Figure 3: The switch panel is suitable for a wide range of vehicles and marine applications.
4. Operating Instructions
Operating the EARU Rocker Switch Panel is straightforward. Each rocker switch controls a connected electrical appliance, while the USB ports and cigarette lighter provide power for other devices.
Rocker Switches:
- To turn on a connected appliance, press the top part of the rocker switch. The integrated LED indicator will illuminate (typically blue, green, or red depending on the model) to confirm the switch is in the 'ON' position.
- To turn off an appliance, press the bottom part of the rocker switch. The LED indicator will turn off.
LED Lighting Effect:

Figure 4: The LED constant brightness helps easily locate switches in the dark and indicates their status.
USB Charging Ports:
- Plug your USB charging cable into one of the dual USB ports.
- Connect the other end of the cable to your mobile phone, tablet, GPS, or other compatible device. The ports provide 5V output for charging.
Cigarette Lighter Socket:
- Insert compatible 12V/24V accessories (e.g., car vacuum cleaner, car refrigerator) into the cigarette lighter socket.
Voltage Meter:
- If your model includes a voltage meter, it will continuously display the input voltage (6-30V range), allowing you to monitor your vehicle's battery status.
Product Demonstration Video:
Video 1: Demonstration of the 4-Gang Rocker Switch Panel, showing switch operation and pre-wired connections.
5. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your EARU Rocker Switch Panel.
- Cleaning: Wipe the panel surface with a soft, damp cloth. Avoid using abrasive cleaners or solvents that could damage the material or markings.
- Connection Checks: Periodically inspect all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to intermittent operation or overheating.
- Environmental Protection: While the panel is IP68 rated, prolonged exposure to extreme conditions (e.g., direct saltwater spray, harsh chemicals) should be minimized to preserve its appearance and functionality.
- Switch Inspection: Check the rocker switches for smooth operation. If a switch feels stiff or unresponsive, inspect for any debris or damage.
6. Troubleshooting
If you encounter issues with your switch panel, refer to the following common troubleshooting steps:
- No Power to Panel/Switches:
- Check the main power input connection to the panel.
- Verify the fuse in the power line is intact and not blown.
- Ensure the vehicle's battery has sufficient charge.
- Individual Switch Not Working:
- Check the wiring connection between the switch output and the accessory.
- Ensure the accessory itself is functioning correctly.
- Inspect the switch for physical damage.
- USB Ports Not Charging:
- Confirm the panel has power.
- Try a different USB cable and device to rule out external issues.
- Ensure the device requires 5V charging.
- Voltage Meter Not Displaying:
- Check the main power connection to the panel.
- Ensure the input voltage is within the 6-30V detection range.
- LED Indicator Not Lighting Up:
- If the switch functions but the LED does not, there might be an issue with the LED itself or its internal wiring.
If these steps do not resolve the issue, contact customer support for further assistance.
7. User Tips
- Label Your Switches: Although the panel is pre-wired, consider adding custom labels to each switch to clearly identify the function of each connected accessory. This improves usability, especially in complex setups.
- Fuse Protection: Always ensure that the main power input to the switch panel, as well as individual accessory circuits, are properly fused according to their current draw to protect against overloads and short circuits.
- Wire Management: Utilize cable ties or wire loom to keep the wiring behind the panel neat and organized. This not only improves aesthetics but also prevents wires from chafing or becoming disconnected.
- Voltage Monitoring: Regularly check the voltage meter (if equipped) to monitor your battery's health, especially before and during extended use of accessories.
8. Warranty and Support
EARU products are manufactured to high-quality standards. For warranty information, technical support, or any questions regarding your Rocker Switch Panel, please refer to the seller's specific warranty policy or contact the manufacturer directly through their official channels. Keep your purchase receipt as proof of purchase.





