Garmin Constant Power Cable for Dash Cam - OBD-II Power Solution

In this review the Garmin Constant Power Cable is examined for drivers who want uninterrupted dash cam operation while parked. The bottom line: this cable is for vehicle owners who need a simple way to keep a compatible Garmin dash cam powered from the OBD-II port even when the ignition is off. Installation is straightforward and the cable provides a steady power source, making it a practical choice for anyone who wants parking mode monitoring without hardwiring to the fuse box.

Key Features

• OBD-II Power: Plugs into the vehicle OBD-II port to supply constant power to a compatible Garmin dash cam for parking mode operation.
• Wide Compatibility: Works with most passenger vehicles that use the standard OBD-II connector so owners can power multiple Garmin dash cam models.
• Simple Installation: Installation is as easy as plugging the cable into the OBD-II port, making it accessible to non-technical users.
• Built Quality: Constructed to provide reliable power delivery, customers report a solid feel and consistent performance over time.
• Lightweight Package: Shipped with compact package dimensions and a low package weight, which helps with handling and storage.

Who It's For

The Garmin Constant Power Cable is best for passenger vehicle owners who use a compatible Garmin dash cam and want continuous power for features like parking mode without opening the dash or tapping fuses. It appeals to drivers who prefer a reversible, non-invasive install that can be removed quickly when needed.

It is not suitable for commercial vehicles with a J1939 connector or for users who require a hardwired, concealed install for theft deterrence. If a fully hidden wiring solution or compatibility with heavy-duty trucks is required, look for a cable designed specifically for those systems.

Pros & Cons

Pros

• Easy to install by plugging into the vehicle OBD-II port, no special tools required.
• Provides a steady, constant power source so the dash cam can remain active when parked.
• Compatible with most passenger vehicles and known to work reliably with Garmin dash cams.
• Compact, light package and good build quality reported by customers.

Cons

• Not compatible with commercial vehicles using a J1939 connector, limiting use in trucks and some fleet vehicles.
• Some customers raised mixed concerns about battery drain and overall value for money, so users should monitor battery impact after installation.

Specifications

Product Type	Gps Or Navigation System accessory
Interface	Vehicle OBD-II port
Package Dimensions	2.756 in L x 1.142 in W x 5.512 in H
Package Weight	0.19 Lbs
Country of Origin	Taiwan
Compatibility Note	Compatible with most passenger vehicles; not for J1939 commercial connectors

Our Verdict

The Garmin Constant Power Cable is a practical, low-effort solution for passenger vehicle owners who want their compatible dash cam to stay powered while parked. Its simple OBD-II plug-in design and reliable construction make it a good value for most users, though owners of commercial vehicles or those anxious about battery drain should consider alternative hardwire kits or monitor vehicle battery impact after installation.

Frequently Asked Questions

Will this cable work with my vehicle?
It works with most passenger vehicles that provide a standard OBD-II connector; it will not work with commercial J1939 connectors used on some trucks.

Is installation difficult?
No, customers report the install is as simple as plugging the cable into the OBD-II port and connecting the dash cam.

Will it drain my car battery?
Some users noted mixed results on battery drain; monitor your vehicle battery after installation and consider a battery protection setting if available on your dash cam.