RED WOLF OBD2A-to-OBD1 Conversion Harness for 1996–1999 Acura Integra & 1996–1998 Honda Civic — Plug-and-Play Manual-Transmission

This RED WOLF harness converts a vehicle’s OBD2A diagnostic port to an OBD1 ECU plug for compatible 1996–1999 Acura and 1996–1998 Honda models, providing a simple plug-and-play jumper connection without cutting wires.

If you need to connect an OBD1-style engine control unit or diagnostic tool to a late-1990s Honda/Acura vehicle that uses the OBD2A wiring, this adapter gives you a straightforward bridge. Built for specific model years and manual-transmission cars, the cable preserves factory wiring while routing necessary signals between the vehicle harness and an OBD1 ECU or device.

Which cars and years will this adapter work with?

The RED WOLF OBD2A-to-OBD1 harness supports several Honda and Acura vehicles from the mid-1990s. It’s designed for models that shipped with the OBD2A connector and need to interface with an OBD1 ECU or harness. Confirm your vehicle’s diagnostics port type and transmission before ordering.

• Compatible models: 1996–1999 Acura Integra; 1996–1998 Honda Civic/Del Sol
• Also covers: 1996–2001 Honda Prelude and 1996–1997 Honda Accord
• Manual transmission only; not compatible with automatic transmission wiring

How does installation work and what tools are required?

Installation is plug-and-play: no splicing, soldering, or permanent wiring changes are necessary. The adapter plugs into the vehicle’s OBD2A socket with the red connector and accepts the OBD1 ECU or interface on the gray connector. Basic access to the dash or engine-bay diagnostic port is all you need.

• Red plug connects to the car’s OBD2A port; gray plug mates to the OBD1 device
• No cutting or rewiring; reversible and non-destructive
• Works best when connectors and pins are clean and undamaged

What are the build quality and electrical safety features?

RED WOLF constructed this jumper harness with durable materials to ensure reliable electrical contact and resistance to wear. The housing is molded ABS plastic and the internal conductors are high-conductivity copper with PVC insulation to help prevent corrosion and signal loss. The adapter is a passive wiring bridge and does not modify ECU programming.

• ABS plastic housing for impact and heat resistance
• Pure copper conductors for low-resistance signal transfer
• PVC insulation to protect against abrasion and environmental exposure

Are there limitations or compatibility caveats I should know about?

This adapter converts an OBD2A-style harness to an OBD1 ECU plug only when both the vehicle harness and target ECU conform to the expected specifications. It is not a universal solution and will not work for OBD2B or non-standard ECU pinouts. Always verify the diagnostic connector type and transmission before purchase.

• Not compatible with OBD2B or non-OBD1 ECUs
• Not usable if vehicle harness is not true OBD2A spec or ECU is not OBD1 spec
• Compatibility depends on computer and harness specs, not the engine displacement

Who is this for: Technicians, tuners, and DIY enthusiasts working on late-1990s Honda and Acura cars who need a reversible, non-destructive way to connect an OBD1 ECU or diagnostic device to an OBD2A vehicle harness. If you require an adapter for manual-transmission models within the supported years and want a rugged, plug-and-play cable without cutting factory wiring, this RED WOLF harness is engineered for that use.