I believe the Dash Harness would be #4, right?(99-00) any chance you might have a part number (dash harness) for the dealer or majestic Honda? I was always under the impression that it goes through the firewall as well....so I take it only goes from the driver's side fuse area to the ECU on the right passenger kick panel?
If so, then 32117-S04-C02 is the OEM Part Number.