Momento MD-HRN-PWR-8000

The Firstech MD-HRN-PWR-8000 is the Hardwire Power Harness designed specifically for the Momento M8 series of dash cams.

Here is a detailed breakdown of the part:

Primary Application

• Device Compatibility: Fits the Momento M8 (MD-8000), Momento M8 Max (MD-8400), and related 4K/2K M8-series cameras.

• Connection Type: Connects the camera’s USB-C power port directly to the vehicle’s fuse box.

Key Functions

• Enables Parking Mode: Unlike a standard cigarette lighter adapter that turns off with the car, this hardwire kit provides constant power. This allows the M8 camera to utilize its “Eco” Parking Mode (Radar detection) to monitor the vehicle while it is parked and the engine is off.

• Voltage Protection: Includes built-in low-voltage cutoff logic (managed by the camera’s software) to prevent the dash cam from draining the car battery completely.

Wiring Breakdown (3-Wire System)

This harness typically has three wires that must be connected to the vehicle:

1. Yellow (BAT+): Constant 12V power (Connect to a fuse that is always hot).

2. Red (ACC): Accessory/Ignition power (Connect to a fuse that only turns on when the key is turned).

3. Black (GND): Chassis Ground.

Critical Note: USB-C Change

It is important to note that the Momento M8 series switched to a USB-C power connector.

• MD-HRN-PWR-8000: USB-C (For M8).

• Old M6/M7 Cables: Barrel/Coaxial connectors.

• They are not interchangeable. If you are upgrading from an older Momento M6 or M7 to an M8, you must change the power cable to this one (or the OBD version).