For automotive enthusiasts and professional mechanics undertaking engine swaps, wiring is often a critical and complex task. The Rywire B-series Harness Obd2 is engineered to simplify this process, offering a high-quality, reliable, and nearly plug-and-play solution for B-series engine conversions, particularly when dealing with OBD2 systems. Built with the same meticulous standards as our Mil-spec line, the Rywire budget wire-tuck engine harness provides exceptional performance and durability at a competitive price point.
Key Features of the Rywire B-Series Harness
This harness is designed with several key features to ensure optimal performance and ease of installation:
- High-Quality Construction: Utilizing all new connectors and materials, each harness is built to last. Connectors are crimped using pneumatic heads, guaranteeing an OEM-grade crimp every time. Each connection is then clearly labeled with a white identification tag, streamlining the installation process and minimizing errors.
- Enhanced Protection: Circuits prone to interference are shielded and properly grounded with robust wire covering. This attention to detail ensures signal integrity and prevents electrical issues that can plague engine swaps.
- 100% Quality Tested: Every Rywire engine harness undergoes rigorous 100% pin-to-pin quality testing. Resistance checks are also performed to eliminate voltage fluctuations, ensuring consistent and reliable performance right out of the box.
OBD Compatibility and Adaptability
It’s important to understand the OBD compatibility of the Rywire B-series harness. All Rywire engine harnesses are built with OBD1 (92-95) computer connectors. This design choice offers broad compatibility and a robust foundation.
For those using OBD2a or OBD2b computers, a simple adapter is required. This adapter bridges the OBD1 harness to your OBD2 computer, making the Rywire harness versatile across different Honda/Acura models and engine management systems.
Crucially, our harness is designed for aftermarket computers using OBD2 plugs and Non-US OBD2 computers. It’s important to note that USDM OBD2 computers are not directly supported with this harness, with the exception of aftermarket or Non-US OBD2 ECUs. Stock USDM OBD2 computers, such as those from H22 and GSR engines, are not plug-and-play compatible without further modification or an adapter beyond the standard OBD2 adapter mentioned above. Always verify compatibility with your specific ECU setup.
Modular Design with Chassis-Specific Sub-Harnesses
A standout feature of the Rywire B-series harness is its modular design. Each harness includes a custom back-side sub-harness tailored to your chosen chassis. This innovative approach offers significant advantages:
- Simplified Chassis Swaps: If you decide to change your vehicle chassis in the future, you won’t need to replace the entire engine harness. A new sub-harness is all that’s required, saving you considerable cost and effort.
- Enhanced Versatility: The main engine harness remains compatible with various chassis as long as the engine components are consistent. This modularity makes the Rywire harness a long-term investment for enthusiasts who frequently modify their vehicles.
Sub-harnesses are available separately for previous engine harness customers, ensuring continued support and flexibility. Please contact us directly to order sub-harnesses separately.
Comprehensive Connector List
The Rywire B-series harness includes a wide array of essential connectors:
| Connector | Description |
|---|---|
| Oil Pressure Sending Unit | Monitors engine oil pressure. |
| Knock Sensor | Detects engine knock or detonation. |
| Intake Air Temperature (IAT) | Measures the temperature of incoming air. |
| Oxygen Sensor (Primary 4 Wire) | Monitors exhaust gas oxygen levels (pre-cat). |
| OBD2 Alternator Plug Type | Connects to OBD2-style alternators. |
| 2 Extra Wires | Provides spare wires for custom applications. |
| OBD2 Injectors 1-4 | Connects to OBD2-style fuel injectors. |
| MAP Sensor | Measures manifold absolute pressure. |
| TPS (Throttle Position Sensor) | Monitors throttle valve position. |
| Idle Control Motor (IAC) | Controls engine idle speed. |
| Electronic Speed Sensor (ESS) | Senses vehicle speed. |
| Ground | Essential grounding point for the harness. |
| Fan Switch | Controls radiator cooling fan operation. |
| OBD2 10-Pin Distributor Plug | Connects to OBD2-style distributors. |
| H20 Sending Unit | Sends coolant temperature to gauge cluster. |
| Reverse Lights | Triggers reverse lights when backing up. |
| Engine Coolant Temp (ECT) | Measures engine coolant temperature. |
| Starter Signal | Signal to engage the starter motor. |
| VTEC Solenoid | Controls VTEC engagement for performance. |
| OBD1 Computer Plugs A, B, D | Connects to OBD1-style ECUs. |
| Power Distribution Cap | Central power distribution point. |
Detail of connectors on a Rywire B-series harness, showcasing the quality and labeling.
Installation Instructions and Support
To assist with installation, Rywire provides detailed PDF instructions for various chassis configurations. These guides are designed to walk you through the process, whether you are installing the harness in a CRX/Civic (88-91), Integra DA (90-91), Civic/Integra (92-95), or OBD2a/OBD2b vehicles.
Instruction Manual Links:
- 88-91 CRX/Civic EF Chassis Adapter
- 90-91 Integra DA Chassis Adapter
- 92-95 Civic & 92-95 Integra EG/DC Chassis Adapter
- OBD2a Vehicle Chassis Adapter
- OBD2b Vehicle Chassis Adapter
Example of Rywire instruction manual icon, linked to detailed PDF guides.
Warranty and Guarantee
Rywire stands behind the quality of its products. The B-series engine harness is warrantied and guaranteed to be functional. However, due to the custom nature and application-specific design of these harnesses, they are non-refundable. This policy ensures that each harness is treated as a specialized component for engine swap projects.
Conclusion
The Rywire B-series harness OBD2 is the ideal choice for anyone seeking a reliable, high-performance wiring solution for their B-series engine swap. With its robust construction, OBD2 adaptability, modular design, and comprehensive connector list, this harness simplifies the wiring process and ensures a successful engine conversion. Upgrade to Rywire and experience the difference quality wiring makes in your project.
