Tucked B/D Series Engine Harness
Fitments for OBD1 or OBD2
Works with 96-98 Civic or 99-00 Civic
All-New Connectors with OEM-Quality Pneumatic Crimps

Description
Vehicle Fitment
Technical Data
Included
Install Guide

Rywire B/D Series Tucked Engine Harness - 1996-2000 Honda Civic (EK)

Want your engine bay to look like you actually planned it instead of like a 25 year old loom exploded? This Rywire tucked harness does the job. It's a complete engine harness setup for 1996-2000 Civics that works with both B series and D series engines, whether you're doing a swap or just replacing a crusty factory harness that's been heat soaked and hacked up. You get the tucked engine harness plus the matching chassis jumper harness in the box, so you don't end up playing guess the plug halfway through the install.

Made in the USA with Mil Spec Wire

Rywire builds this harness in the USA using Mil Spec Teflon coated wire rated to 200°C. That matters when your header sits two inches from the loom and you actually drive the car. The budget friendly part is the single black wire color and expandable loom instead of multicolor mil spec sleeving, but you still get brand new connectors, pneumatic crimps for OEM style connections, labeled branches so you don't lose your mind, and pin to pin plus resistance testing on every harness. We run these exact harnesses on our own builds because intermittent electrical problems ruin weekends fast.

Includes Engine Harness and Chassis Adapter

Every Rywire B/D Series harness comes with the B1 base engine harness and the corresponding chassis jumper harness for your Civic. The engine side covers all your sensors, injectors, and ECU connections. The chassis side plugs into your factory dash harness and shock tower connections. Rywire splits these into two pieces so you can reuse the engine side later if you swap it into a different chassis. Just grab a different adapter and you're done.

Pick Your ECU and Chassis Year

Rywire makes this harness in OBD1 and OBD2 versions, and the chassis harness splits between 1996-1998 and 1999-2000 Civics since the interior and shock tower connections changed. Here's how to pick the right setup:

OBD1 Version (SKU: RYW-RY-B1-EK-2A)

This version has OBD1 ECU plugs (A, B, and D connectors) and OBD1 distributor plugs. Use this if you're running a Hondata, Kpro, or stock OBD1 ECU.

OBD2 Version (SKU: RYW-RY-B2-EK-2A)

This version has OBD2 engine side wiring but uses OBD1 ECU plugs (A, B, and D), so you can run an OBD2 to OBD1 adapter harness if you want. It will not support USDM factory OBD2 ECUs, but it does work with aftermarket ECUs that use OBD2 plugs and some non-USDM OBD2 computers. If you're running a Hondata or Haltech with an OBD2 adapter, this is the version you want.

1996-1998 Civic Chassis Harness

Pick this if you have a 1996, 1997, or 1998 Civic. The chassis side connections are different from the 1999-2000 cars.

1999-2000 Civic Chassis Harness

Pick this if you have a 1999 or 2000 Civic. Honda changed the interior and shock tower connections for these years.

What's Covered in the Harness

This harness includes connectors for all your engine sensors and components:
- Oil pressure sending unit
- Knock sensor
- Intake air temperature sensor (manifold style)
- Primary 4-wire oxygen sensor
- MAP sensor
- Throttle position sensor (TPS)
- Idle control motor
- Electronic speed sensor
- Radiator fan switch
- Engine coolant temperature sensors (ECU and gauge)
- Starter signal
- Reverse light circuit
- VTEC solenoid
- Power distribution cap
- Ground circuits
- OBD1 ECU plugs (A, B, and D) on both OBD1 and OBD2 versions
What's Not Included

Injector adapters, alternator adapters, distributor adapters, and charge harnesses are sold separately. You'll probably need at least injector adapters if you're doing a B series swap into an EK, since the injector plugs changed between generations.

Modular Design Saves You Money Later

Rywire builds this as a modular setup where the engine side separates from the chassis side jumper harness. If you swap this engine into a different chassis later, or move to a different year Civic, you can keep the engine side harness and just buy a different chassis adapter. This saves you from buying an entire new harness every time you change cars.

What You Get
- Rywire B1 tucked engine harness
- EK Civic chassis adapter jumper harness (1996-1998 or 1999-2000)
- Mil Spec Teflon coated wire rated to 200°C
- Brand new connectors with pneumatic crimps
- Single black wire color with expandable loom
- Labeled branches for easy installation
- Pin to pin tested and resistance checked
- Made in the USA
Fits Your Chassis
- 1996-2000 Honda Civic (EK chassis)
Works With These Engines
- B series engines (B16, B17, B18, B20)
- D series engines (D15, D16)
Available Options
- SKU: RYW-RY-B1-EK-2A - OBD1 version with 1996-1998 or 1999-2000 chassis harness
- SKU: RYW-RY-B2-EK-2A - OBD2 version with 1996-1998 or 1999-2000 chassis harness
Note: Injector adapters, alternator adapters, distributor adapters, and charge harnesses sold separately. OBD2 version uses OBD1 ECU plugs and will not support USDM factory OBD2 ECUs.
1996-2000 Honda Civic
(1) Tucked Engine Wiring Harness
(1) Chassis Specific Adapter Harness

Civic 1996-2000 Electronics

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Rywire B/D Series Tucked Engine Harness for 96-00 Civic