RED WOLF OBD2B to OBD1 ECU Jumper Harness for Honda/Acura (1998–2002) — Plug-and-Play, Manual-Trans Only

RED WOLF's OBD2B to OBD1 jumper harness is a plug-and-play wiring adapter that lets OBD1-spec ECUs connect to OBD2B vehicle harnesses for supported Honda and Acura models.

If you need to mate an older OBD1 engine computer to the later OBD2B diagnostic socket without cutting factory wiring, this adapter provides a practical wiring bridge. Built for specific late-1990s and early-2000s Hondas and Acuras, the cable routes signals between the car's OBD2B port and a 1992–1995 OBD1 ECU so you can test or use legacy computers. It’s important to confirm both your ECU and vehicle harness match the required specs before ordering.

Will this harness work with my car and ECU?

Check the model years and ECU standard first: this jumper is made for cars with an OBD2B-style diagnostic connector and ECUs that follow the OBD1 pinout from 1992–1995. It specifically covers Honda Accord (1998–2002), Civic (1999–2000), and Acura Integra (2000–2001).

• Compatible vehicle harness: OBD2B only (not OBD2A).
• Compatible ECU: OBD1 spec from approximately 1992–1995.
• Supported models: Accord 1998–2002, Civic 1999–2000, Integra 2000–2001.
• Not suitable if ECU or car harness does not match these specifications.

How simple is installation and what connectors are used?

Installation is straightforward—designed as plug-and-play so no splicing or soldering is required. The harness uses a red plug to mate with the car’s OBD2B port and a gray plug to attach to the OBD1 device, keeping factory wiring intact and minimizing installation time.

• Plug-and-play — no wire cutting needed.
• Red plug fits OBD2B vehicle connector; gray plug fits OBD1 ECU.
• Designed for field testing, ECU swapping, and bench connection setups.
• Recommended for manual-transmission vehicles only (see compatibility notes).

Are there limitations or special warnings I should know?

Yes. This adapter is intended for manual-transmission applications and will not work for vehicles that require automatic-transmission specific wiring or for OBD2A harnesses. Compatibility depends on electrical and diagnostic pinouts rather than the engine itself, so verifying both ECU and vehicle harness type is essential before using it.

• Manual transmission only; not compatible with automatic-transmission ECU configurations.
• Only converts OBD2B to OBD1 — not an OBD2A solution.
• Does not change ECU programming or diagnostic protocols beyond wiring adaptation.
• Confirm pinouts and part numbers when in doubt to avoid misconnection.

What materials and build quality can I expect?

The harness is built to resist everyday workshop conditions. It combines an ABS plastic housing with pure copper conductors and PVC insulation to maintain good electrical contact and resist corrosion and wear over time.

• ABS plastic connectors for durable, impact-resistant housings.
• Pure copper wires for reliable conductivity and signal transfer.
• PVC insulation to protect against abrasion and environmental exposure.
• Quality control aimed at consistent pin-to-pin connections for diagnostics.

Who is this for: The RED WOLF OBD2B to OBD1 jumper harness is aimed at DIY mechanics, tuners, and technicians who need a safe, reversible way to connect 1992–1995 OBD1 ECUs to later OBD2B-equipped Hondas and Acuras. If you work with legacy ECUs for testing, swapping, or diagnostic purposes on the listed model years and have a manual-transmission vehicle, this adapter simplifies setup without altering factory wiring. Do not purchase if your ECU or vehicle harness is outside the listed specifications, or if you require automatic-transmission or OBD2A conversion functionality.