Rywire Charge Harness for Honda/Acura B/D/F/H/K Series

Rywire Charge Harness - Honda/Acura B/D/F/H/K Swaps

A charge harness is the heavy-current wiring that runs between the battery, the starter, and the alternator, and it carries more amperage than anything else in the car. When you swap an engine into an older Honda or Acura, the factory charge wiring is usually three decades old, the wrong length for your new layout, or gone entirely once the harness is tucked and the battery is relocated. This Rywire charge harness replaces it with clean, correctly sized cable, and it's built to pair with Rywire's engine harnesses to finish the high-current side of the job the engine harness doesn't cover.

Why Your Swap Needs One

Your engine harness handles the signal and sensor wiring, but it doesn't carry the charging and cranking current, and that's where a swap's electrical problems usually start. The starter draws heavy amperage every time you crank, and the alternator pushes charge back the entire time the engine runs. Route that through old, undersized, or corroded cable and you get voltage drop, which shows up as weak cranking, dim or flickering lights, poor charging, and intermittent faults that are difficult to trace. Fresh, properly sized charge wiring eliminates that entire category of problem.

Built to Finish a Rywire-Wired Swap

This harness is designed to integrate directly with Rywire's engine harnesses, so it drops into the setup rather than leaving you to splice your own cables. It uses two eight-gauge cables, one from the fuse box to the starter and one from the fuse box to the alternator, both sized to carry full current without restriction. It's the companion to the engine harness, and running the two together gives you a swap that's wired correctly from end to end instead of half-finished.

Choose Your Engine Family

Pick the version that matches the engine you're running, since the routing is built around each family:

• B-series (RYW-CHARGE-B): B16A, B17A, B18A, B18B, B18C, B20B
• D-series (RYW-CHARGE-D): D15, D16, D17
• F-series (RYW-CHARGE-F): F22B, F23A
• H-series (RYW-CHARGE-H): H22A, H23A
• K-series (RYW-CHARGE): K20A, K20Z, K24A

Fitment

Covers B, D, F, H, and K-series engines going into these chassis:

• 1990-1993 Acura Integra
• 1994-2001 Acura Integra
• 2002-2006 Acura RSX
• 2004-2008 Acura TSX
• 1990-2002 Honda Accord
• 1992-2005 Honda Civic
• 1999-2000 Honda Civic Si
• 2002-2011 Honda Civic Si
• 1997-2001 Honda CR-V
• 2002-2006 Honda CR-V
• 1993-1997 Honda Del Sol S/Si
• 1994-1997 Honda Del Sol VTEC
• 2003-2011 Honda Element
• 1992-2001 Honda Prelude

Who Should Grab This

If you're wiring a swap with a Rywire engine harness, this is the other half of that job. The engine harness manages the signal wiring, and this manages the heavy charging and cranking power, so running both is how you get an electrical system you can rely on. Match it to your engine family, pair it with your engine harness, and wire the car right the first time.