1. Introduction and Overview
Product Description
The Geotab HRN-CM24Y1 harness is engineered for specialized installations requiring multiple access points to vehicle engine data and communication protocols. This harness facilitates connections for Geotab GO devices to various vehicle data buses.
Key Features
- Designed for custom installations where multiple connection points are required to access engine data and engine protocols.
- Compatible with Geotab GO Devices: GO6, GO7, GO8, and GO9.
- Features Molex connectors for two OBD (On-Board Diagnostics) connections and one J1939 connector.
- Can be used in conjunction with other harnesses such as HRN-CH06A2 or HRN-CE04A4 for diverse engine data ports.
2. Setup Guide
Components
The HRN-CM24Y1 harness includes the following primary components:
- One ALDL connector (for connection to the Geotab GO device).
- One white 6-pin Molex connector (for an OBD connection).
- One black 12-pin Molex connector (for a second OBD connection).
- One 6-pin Molex connector (for a J1939 connection).
Installation Steps
Follow these general steps for installing the HRN-CM24Y1 harness:
- Identify Connection Points: Locate the necessary OBD and J1939 ports within your vehicle. Consult your vehicle's service manual if unsure.
- Connect to GO Device: Plug the ALDL connector end of the HRN-CM24Y1 harness into your Geotab GO device. Ensure a firm connection.
- Connect Molex Connectors: Attach the white 6-pin Molex connector to the designated OBD port, the black 12-pin Molex connector to the second OBD port, and the 6-pin Molex connector to the J1939 port. Ensure each connector clicks securely into place.
- Secure Cabling: Route the harness cables safely away from moving parts, heat sources, and areas where they could be pinched or damaged. Use cable ties if necessary.
- Verify Connection: Once all connections are made, power on the vehicle and the GO device to confirm proper data transmission. Refer to the GO device's indicator lights for status.
This image displays the Geotab HRN-CM24Y1 harness. It features a main black ALDL connector on one end, leading to a cable that splits into three smaller connectors: a white 6-pin Molex connector for one OBD connection, a black 12-pin Molex connector for a second OBD connection, and another 6-pin Molex connector for a J1939 connection. Labels for J1939 and OBDII are visible near the Molex connectors.
3. Operation
Functionality
The HRN-CM24Y1 harness acts as an interface, enabling your Geotab GO device to communicate with and extract data from multiple vehicle data buses simultaneously. This is particularly useful in custom installation scenarios where access to both OBD and J1939 protocols is required for comprehensive vehicle monitoring and diagnostics. Once properly connected, the harness facilitates the flow of engine data and other vehicle parameters to the GO device for logging and transmission.
4. Maintenance and Care
General Care
To ensure the longevity and reliable performance of your HRN-CM24Y1 harness, observe the following care guidelines:
- Keep Connections Clean: Periodically inspect connectors for dirt, dust, or corrosion. Clean gently with a dry, lint-free cloth if necessary.
- Avoid Physical Stress: Do not pull on the cables to disconnect the harness. Always grasp the connector housing firmly. Avoid sharp bends or excessive tension on the cables.
- Temperature Exposure: Avoid exposing the harness to extreme temperatures outside of typical vehicle operating conditions.
Storage
If the harness is not in use, store it in a clean, dry, and cool environment, away from direct sunlight and corrosive materials. Keep it coiled loosely to prevent kinks or damage to the internal wiring.
5. Troubleshooting
This section provides solutions to common issues you might encounter with the HRN-CM24Y1 harness.
| Issue | Possible Cause | Solution |
|---|---|---|
| No data connection from GO device | Loose or incorrect harness connection to vehicle ports or GO device. | Ensure all connectors (ALDL, OBD, J1939) are fully seated and secure. Verify the correct Molex connectors are plugged into their respective ports. |
| Inconsistent or erroneous data readings | Interference, damaged cable, or incorrect port mapping. | Check for any physical damage to the harness. Ensure the harness is not routed near high-voltage cables or sources of electromagnetic interference. Confirm Molex connectors are attached to the correct OBD/J1939 ports as per vehicle specifications. |
| Physical damage to harness (e.g., frayed wires, cracked connectors) | Excessive pulling, bending, or exposure to harsh conditions. | Immediately discontinue use. A damaged harness can lead to unreliable data or electrical issues. Replace the harness with a new one. |
6. Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | HRN-CM24Y1 |
| Manufacturer | Geotab |
| Brand | Geotab |
| Item Weight | 2.89 ounces |
| Package Dimensions | 5.83 x 5.75 x 1.34 inches |
| ASIN | B08K1C4X6 |
| GO Devices Supported | GO6, GO7, GO8, GO9 |
| Connector Types | ALDL, White 6-pin Molex (OBD), Black 12-pin Molex (OBD), 6-pin Molex (J1939) |
7. Warranty Information
Specific warranty details for the Geotab HRN-CM24Y1 harness are not provided in this manual. For comprehensive warranty information, including terms, conditions, and duration, please refer to the official Geotab website or the documentation included with your purchase. It is recommended to register your product, if applicable, to ensure full warranty coverage.
8. Customer Support
For further assistance, technical support, or inquiries regarding the HRN-CM24Y1 harness, please visit the official Geotab website. The website provides access to a knowledge base, FAQs, and contact information for their customer support team. Ensure you have your product model number (HRN-CM24Y1) ready when contacting support.
