This 14-pin RP-1226 14-way adapter cable is a dedicated replacement and extension harness designed specifically for Freightliner and Western Star heavy-duty trucks equipped with the RP-1226 telematics port.
It provides a secure and reliable connection point for installing ELD devices, GPS tracking units, video telematics, and fleet management hardware, ensuring proper communication through the J1939/J1708 CAN bus without interference.
Unlike standard PR1226/RP1226 splitter cables, this model is built as a vehicle-specific adapter harness, following the OEM wiring layout used in Freightliner’s North American heavy-duty platforms.
Freightliner RP-1226 Adapter Cable: Product Highlights
Freightliner-Specific RP-1226 Layout
Engineered according to the 14-way telematics connector standard used in Cascadia and other DTNA models, ensuring perfect installation compatibility.
Stable J1939/J1708 CAN Bus Communication
High-quality shielding, twisted-pair signal wiring, and controlled impedance ensure accurate data transmission for all telematics devices.
Heavy-Duty Molded Connector + Strain Relief
OEM-grade PA66 housing, over-molded construction, and reinforced strain relief withstand vibration, shock, and harsh under-dashboard environments.
Easy Plug-and-Play Installation
No need to modify factory wiring. Connects directly to the factory RP-1226 diagnostic/telematics port.
Custom Length & Pinout Available
Support for OEM/ODM customization — wire gauge, wire length, cable jacket, labeling, branding, and special routing requirements.
Key Specifications
Freightliner RP-1226 Adapter Cable: Key Specifications
- Connector Type: RP-1226 14-Way Male/Female (Freightliner standard)
- Wire Gauge: 20 AWG (power), 22 AWG (signal)
- Shielding: 100% copper braid + aluminum foil
- Jacket Material: PVC or TPE (oil-resistant / abrasion-resistant)
- Operating Temperature: −40°C to +105°C
- Protocol Support:
- SAE J1939 (CAN)
- SAE J1708
- OEM manufacturer-specific communication lines
- Certifications: RoHS / REACH / ISO9001 / IATF16949 factory-level QC
Compatible Freightliner Vehicles for the RP-1226 Adapter Cable
This adapter is compatible with
- Freightliner Cascadia (EPA2017+, EPA2021+)
- Freightliner M2 series
- Western Star models using RP-1226 ports
- Detroit Diesel platforms with RP-1226 telematics connectors
Typical device applications:
- ELD (Electronic Logging Device)
- GPS Tracking Unit
- Video Telematics / Dash Cameras
- Fleet Management Gateway
- Remote Diagnostics Modules
- Data Loggers
Applications & Use Cases
✔ Replacement for OEM RP-1226 Telematics Port
Ideal for repairing damaged or missing factory telematics connectors.
✔ Extension Cable for Proper Device Positioning
Allows relocation of telematics hardware to safer or hidden mounting positions.
✔ Fleet Retrofit & Upgrades
Perfect for fleets upgrading devices or adding new onboard telematics systems.
✔ Engineering Integrations
Suitable for telematics manufacturers who require stable RP-1226 test harnesses.
Why Choose Us? (Factory-Direct Advantages)
20+ Years Automotive Cable Manufacturing
All connectors and molded harnesses are produced in-house using ISO and IATF-certified processes.
OEM / ODM Customization
We support complete customization of:
- Wire length
- Pinout configuration
- Cable jacket color
- Over-mold shape
- Branding / logo / private label
- Packaging
4-Step Quality Assurance
Every unit undergoes:
- Pin continuity test
- CAN-signal quality test
- Hi-Pot insulation test
- Final visual inspection
Engineering Support
Our team provides one-on-one technical support for OEMs and fleet solution providers.
Frequently Asked Questions
Q1. Is this the same as the RP1226 Y-splitter cable?
A: No. This page describes a Freightliner-specific adapter harness, not the universal Y-splitter.
If you need the Y-splitter instead, here is the correct product:
👉 RP1226 14-Pin Male to Female Splitter Y Cable
Q2. Can this cable be customized for OEM integration?
Yes. Wire length, pin layouts, label printing, and connector molding can all be customized.
Q3. Will this work with all ELD devices?
Yes. It is fully compatible with all major ELDs, GPS trackers, telematics gateways, and J1939-based devices.
Q4. Do you provide technical pinout details?
Yes — available upon request for OEM customers.
Q5. Does this product support dual-device operation?
Not this model.
If you need dual operation (ELD + GPS at the same time), use the Y-splitter:
Q6. What is your lead time for custom OEM orders?
A: Standard configurations ship in 7-10 days. Custom designs typically require 2-4 weeks after final engineering approval.
Q7. Can you provide samples for testing and validation?
A: Yes. We offer samples to OEMs and serious fleet buyers for on-vehicle testing and qualification.
Q8. Where can I find detailed technical information about the RP-1226 standard?
A: For comprehensive technical information including pinout diagrams, refer to our guide: PR1226 14-Pin Splitter Cable: Complete Guide to Pinout, Specs & Applications.
Contact & Custom Order
For OEM customization, bulk pricing, or technical questions, contact us:
Our engineering and sales team will reply quickly with expert support.
