HRN12-CW03K3 kit is installed in vehicles or assets where no diagnostic port is available, due to the age or type of vehicle, or to track the vehicle without connecting to the bus (such as asset tracking). It has three wires that connect to power, ground, and ignition. The HRN12-CW03K3 is used with a GO device.
The HRN12-CW03K3 kit connects to any vehicle, providing GPS tracking (for GO6 or newer devices), accelerometer data (on Pro and ProPlus plans), and ignition voltage (for GO7 or newer devices). Typically used in vehicles manufactured without a diagnostic port (ex, golf cart, generators, older vehicles, etc.), or when the diagnostic connector isn't available to be used.
Note: The GO6 does not have an ignition pin and, as a result, behaves in the same manner with a 3-wire installation as with a 2-wire installation. Specific installation instructions below.
Professional Installation Required — Installation of the HRN12-CW03K3 requires the installer to have sufficient technical knowledge and expertise for mobile device installation and integration into modern vehicles, i.e. Certified Geotab® Installer certification or equivalent.
There are three connection wires when using the HRN12-CW03K3 Harness:
- BLACK — the GROUND wire; it must be connected to a known good chassis ground.
- YELLOW — the ignition sense wire; it must be connected to a true ignition source (live with the key in both the ON and RUN positions, dead when the key is off). Fuse size is 1 A.
- RED — the constant power (12V or 24V) wire; it must be connected to a true battery source (live at all times). Fuse size is 5 A.
The red and yellow wires must connect to a fused source, or the user must install the fuses.
Detecting Ignition Using the HRN12-CW03K3
If an asset is installed with a GO7 or newer device, and is using the HRN12-CW03K3 with all 3 wires connected properly, the device detects the ignition wire and uses it for ignition sensing.
If an asset is installed with a GO6 and an HRN12-CW03K3, the GO6 defaults to ignition detection using accelerometer movement and GPS position changes. The GO6 marks the ignition state as being ON, if it detects the vehicle's motion. This is not as accurate as determining ignition from connecting to the ignition source and cannot be used for idling or similar purposes.
2-wire is an alternate method used by the GO6. The GO6 attempts to determine ignition based on voltage patterns along with GPS and accelerometer readings. This should only be used with GO6 devices where the aforementioned method does not provide the required accuracy. 2-wire ignition sensing requires a set parameter. If this method is required, please contact Support.
Who Should Use This
Any vehicle or asset that does not have a diagnostic port, due to age or type of vehicle.
This harness is typically used in vehicles manufactured without an OBDII connector before 1996 (Golf Cart, Bulldozer, Gator, etc.), and it does not gather engine data.
Features & Benefits
- Allows the GO device to connect to vehicles without a diagnostic port
- Provides GPS tracking, accelerometer data, and ignition voltage