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The HRN-CW03S3 harness is used for installation in vehicles or assets where no diagnostic port is available due to the age or type of the vehicle. It has three wires that connect to power, ground, and ignition. It can be used with a GO6® or GO7® device.
This harness allows for a basic connection to any vehicle, providing GPS tracking (for GO6 and GO7), accelerometer data (on Pro and ProPlus plans), and ignition voltage (for GO7 devices). These harnesses are typically used in vehicles manufactured without an OBDII connector before 1996 (Golf Cart, Bulldozer, Gator, etc.). An installation using this harness will not gather engine data.
Note: The GO6 does not have an ignition pin; as such, it will behave 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 HRN-CW03S3 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.
WARNING! Prior to HRN-CW03S3 installation, read and follow GO device installation instructions (goo.gl/rkLRiA) to ensure GO device installation is correct in preparation for HRN-CW03S3 installation. Incorrect installation of either the GO device, and/or HRN-CW03S3 can result in loss of vehicle control and serious injury.
WARNING! Prior to HRN-CW03S3 installation, read and follow important safety information, including limitations of use, located following these installation instructions. Always read and follow all safety information to prevent loss of vehicle control and serious injury.
Installing the HRN-CW03S3 with a GO7
There are three points of connection when using the HRN-CW03S3:
The red and yellow wires need to be connected to a fused source, or fuses must be installed.
Installing the HRN-CW03S3 with a GO6
The ignition wire should be taped off and left unconnected. De-pin or cut off the YELLOW wire of the HRN-CW03S3 if it will never be reinstalled with a GO7.
Detecting Ignition Using the HRN-CW03S3
If an asset is installed with a GO7 and is using the HRN-CW03S3 with all 3 wires connected properly, the GO7 will detect the ignition wire and will use it for ignition sensing.
If an asset is installed with a GO6 and an HRN-CW03S3, the GO6 will default to detecting ignition using accelerometer movement and GPS position changes. It will mark 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. It 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 accuracy necessary. 2-wire ignition sensing requires a parameter to be set — please contact Support if this method is required.
For the latest version of Limitations of Use, please visit: goo.gl/k6Fp0w.
WARNING! Do not attempt to install, reconfigure or remove any product from any vehicle while the vehicle is in motion or otherwise in operation. All installation, configuration or removal must be done only in stationary vehicles which are securely parked. Attempting to service units while being operated could result in malfunctions or accidents, leading to death or serious personal injury.
WARNING! If at any point after a Geotab in-vehicle device is installed, a warning light illuminates on the vehicle dash or the vehicle stalls or has a marked drop in performance, shut off the engine, remove the device, and contact Geotab support.
WARNING! Do not attempt to remove Geotab in-vehicle devices from the vehicle in which they are originally installed for installation in another vehicle. Not all vehicles are compatible with Geotab in-vehicle devices, and doing so may result in unexpected interactions with your vehicle, including sudden loss of power or shutdown of the vehicle’s engine while in operation or cause your vehicle to operate poorly or erratically.
WARNING! All in-vehicle devices and related cabling must be securely fastened and kept clear of all vehicle controls, including gas, brake and clutch pedals. You must inspect devices and cabling on a regular basis to ensure all devices and cabling continue to be securely attached. Loose cabling or devices may impede the use of vehicle controls, resulting in unanticipated acceleration, braking or other loss of vehicle control, which could lead to death or serious personal injury. Improperly fastened in-vehicle devices may detach and impact operators upon sudden acceleration or deceleration, which may cause injury.
WARNING! Geotab requires the use of a cable tie when securing the GO device or any extension harness to the OBD connector, securing both sides of the harness. If you do not use a cable tie, vibration in the vehicle can lead to a loose connection which could indirectly cause the vehicle’s engine computer to fail. This could result in the vehicle stalling and can even cause personal injury under certain circumstances if it occurs while the vehicle is being driven.
WARNING! Geotab in-vehicle devices must be kept clear of debris, water and other environmental contaminants. Failure to do so may result in units malfunctioning or short-circuiting, causing a fire hazard.
NOTICE — Geotab products do not contain any user-serviceable parts. Configuration, servicing, and repairs must only be made by an authorized Geotab reseller or installer. Unauthorized servicing of Geotab products will void your product warranty. Improper installation may also lead to short circuits and the risk of fire, leading to personal injury or significant damage to your vehicle. Installation or servicing may also require modifications to your vehicle. Failure to comply with specified procedures or without adequate knowledge of the vehicle may result in damage to your vehicle, which may cause malfunctions of vehicle controls or vehicular environmental systems and result in personal injury.