1. Introduction
The VIOFO HK4 Acc Hardwire Cable is designed to provide continuous power to your compatible VIOFO dash cam, enabling advanced parking surveillance features and protecting your vehicle's battery from discharge. This manual provides detailed instructions for installation, operation, and maintenance of your HK4 hardwire cable.
2. Product Overview
The HK4 hardwire cable is an essential accessory for maximizing the functionality of your VIOFO dash cam, especially for parking mode operations. Key features include:
- 24-Hour Parking Surveillance: Provides continuous power to your dash cam even when the vehicle engine is off, ensuring events are recorded.
- Low Voltage Protection: Features a configurable voltage cut-off to prevent your vehicle's battery from over-discharging.
- Automatic Parking Mode Switching: With ACC detection, the dash cam automatically switches to parking mode when the engine is off and resumes normal recording when the engine is on.
- 12V / 24V Compatibility: Designed to work with a wide range of vehicles, including cars, trucks, buses, and SUVs.
- USB-C Connection: Ensures compatibility with modern VIOFO dash cams that utilize a USB-C power input.
3. Package Contents
Please verify that all items are present in your package:
- VIOFO HK4 Hardwire Cable (USB-C)
- User Manual
Note: Fuse taps are NOT included and must be purchased separately. Refer to ASIN B08SJZJCV5 for compatible fuse taps.
Image: Contents of the VIOFO HK4 Hardwire Cable package, showing the hardwire cable, user manual, and packaging box.
4. Installation Guide
Installing the HK4 hardwire cable requires connecting to your vehicle's fuse box. If you are not comfortable with electrical wiring, it is recommended to seek professional assistance.
4.1 Cable Diagram
Image: Diagram of the HK4 hardwire cable showing its components: Battery+ (Red), ACC (Yellow), Ground (Black) wires, Adapter, Hardwire box, and USB Type-C Plug.
- Red Wire (Battery+): Connect to a constant power fuse slot (always on).
- Yellow Wire (ACC): Connect to an ignition-switched fuse slot (on when vehicle is running).
- Black Wire (Ground): Connect to a metal ground point on the vehicle body.
- USB Type-C Plug: Connects to the dash cam's GPS Type-C port.
The hardwire cable length is 13.1ft (4m).
4.2 Tools Required
- Multimeter
- Needle-nose pliers
- Fuse puller
- Trim removal tool
- Fuse taps (not included)
4.3 Step-by-Step Installation
- Locate your Fuse Box: Fuse box locations and types can differ between car models, years, and variants. Refer to your car manual for specific instructions.
Image: Illustration showing the location of a vehicle's fuse box, typically near the driver's footwell.
- Identify Battery & ACC Fuses: To check fuse locations, use a multimeter on DC voltage after turning off the vehicle. 12V or 24V indicates a Battery connection, while 0V indicates an ACC connection.
- Recheck the Fuses: With the ignition turned on, use the multimeter to test the Battery and ACC fuse positions identified in Step 2. Both should show a voltage of approximately 12V or 24V. If not, repeat Step 2.
- Remove the Selected Fuses: Use a fuse puller to remove the fuses from the previously identified Battery and ACC positions.
- Insert the Removed Fuses: Check the type of the removed fuses and confirm the correct fuse model. Then insert each fuse into the corresponding fuse tap.
Image: Illustrations demonstrating how to remove fuses, insert them into fuse taps, and connect the hardwire cable to the fuse taps.
- Connect the Fuse Tap: Insert the metal strands of the hardwire cable into the metal tube of the fuse tap, then use needle-nose pliers to crimp the metal tube tightly.
- Install the Fuse Tap: Insert the fuse tap back into the fuse box and secure it properly to ensure a stable connection.
- Install the Ground Wire (Black): Select a metal screw near the fuse box, loosen the screw, insert the Ground wire's metal terminal under the screw, and then tighten the screw securely.
Image: Illustrations showing how to connect the ground wire, plug the USB-C into the dash cam, test the dash cam, and conceal the wiring.
- Connect the Hardwire Cable: Connect the hardwire cable's Type-C plug into the power part on the top of the dashcam's GPS mount.
Image: Diagram illustrating the correct connection of the HK4 hardwire cable's USB-C plug to the dash cam's GPS Type-C port, with an incorrect connection shown for comparison.
- Test the Dash Cam: Start the vehicle to power on the dashcam. Enter the dashcam settings menu and enable Parking Mode. The parking mode icon will appear at the position on the left side of the screen.
- Conceal the Wiring: Finally, follow the recommended wiring shown in the diagram below and use the trim removal tool to hide the hardwire cable for a clean installation.
Image: Diagram showing the recommended route for concealing the hardwire cable along the vehicle's interior trim, from the dash cam to the fuse box.
5. Operating Instructions
5.1 24-Hour Parking Mode
With the HK4 hardwire cable installed, your dash cam can provide 24/7 parking surveillance. The dash cam will automatically switch to parking mode when the vehicle engine is off and return to normal recording when the engine is started.
Image: Illustrations depicting various parking mode features: Auto Event Detection, Time Lapse Recording, and Low Bitrate Recording.
Parking mode options typically include:
- Auto Event Detection: Records short clips when motion or impact is detected.
- Time Lapse Recording: Continuously records at a low frame rate to save storage space.
- Low Bitrate Recording: Records continuously at a lower video quality to extend recording time.
5.2 Low Voltage Protection
The HK4 hardwire cable features built-in low voltage protection to prevent excessive discharge of your vehicle's battery. You can set a voltage cut-off value with four available options. When the vehicle's battery voltage drops to the configured threshold, the HK4 will automatically stop powering your dash cam, safeguarding your battery.
Image: Diagram illustrating the concept of battery discharge prevention, showing a dash cam connected to a car battery with a protective shield.
Image: Close-up of the HK4 hardwire box showing the configurable voltage cut-off settings for 12V and 24V systems.
6. Compatibility
The VIOFO HK4 hardwire cable is compatible with the following VIOFO dash cam models:
- A329 series
- A229 series (A229Plus, A229Pro)
- A119Mini 2
- A139Pro
- WM1
- T130
Important: This cable is NOT compatible with other series of VIOFO dash cameras, especially those that do not use a USB-C power connector or the GPS Type-C port for power.
Image: Display of compatible VIOFO dash cam models: A329S Series, A229 Series, A119 Mini 2, and A119M Pro, highlighting their Type-C USB compatibility.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | HK4 |
| Connectivity Technology | USB-C |
| Input Voltage | 12V / 24V |
| Output Voltage | 5V 2A Max |
| Cable Length | 13.1 ft (4m) |
| Low Voltage Protection | 4 configurable options |
| Special Features | Parking Monitor, ACC Detection |
| Product Dimensions | 2.76 x 5.51 x 4.33 inches |
| Item Weight | 5.3 ounces |
8. Troubleshooting
If you encounter issues with your VIOFO HK4 hardwire cable, consider the following:
- Dash Cam Not Powering On:
- Ensure all cable connections (Battery+, ACC, Ground, USB-C to dash cam) are secure.
- Verify that the correct fuse slots are used for constant power and ignition-switched power using a multimeter.
- Check the fuse taps and fuses for proper installation and functionality.
- Confirm the dash cam is compatible with the HK4 cable (refer to Section 6).
- Parking Mode Not Activating:
- Ensure ACC wire is correctly connected to an ignition-switched fuse.
- Check dash cam settings to confirm parking mode is enabled and configured correctly.
- Verify the vehicle's battery voltage is above the set low voltage cut-off threshold.
- Battery Drain Issues:
- Adjust the low voltage cut-off setting on the HK4 hardwire box to a higher value.
- Ensure the dash cam's parking mode duration settings are appropriate for your vehicle's battery capacity and usage.
For further assistance, please contact VIOFO customer support.
9. Warranty and Support
VIOFO is committed to providing reliable products and excellent customer service.
- 30-Day Money-Back Guarantee: If you are not satisfied with your purchase.
- 24-Month Warranty Coverage: Extended warranty for your product.
- Dedicated Customer Support: Available 24/7 for any inquiries or issues.
For support, please visit the VIOFO Store or contact them directly:
Email: support@viofo.com
Phone (US): +1 323 505 9898
