Our Pro-Series is ideal for those looking for the best aesthetics, weight savings and reliability. Completely replace your old harness and forget about electrical gremlins. Dress up your bay and take all the pain out of wiring work with this harness.

This Wiring Specialties PRO Series harness was designed from the ground-up, specifically for a Universal installation with a RB20DET S2 engine swap. This harness will work exceptionally well in any installation chassis. Anything from a Dune buggy to a Classic car or a race car. The engine fires up with only 2 wires needing connection, along with a fuel line and a good battery. The harness is designed 'Tucked' for a clean installation. The harnesses are built to exceed OEM spec for wire quality and power/ground routing.

Wiring Specialties offers a number of options for common performance upgrades for this product.  Build your perfect harness by selecting from the available options to the right.

Engine: R32 GTS or GTS-T RB20DET

  • Any Second Gen RB20DET from 1989-1993 Skyline GTS/GTST
  • Any Second Gen RB20DET from 1989-1993 Nissan Laurel and Cefiro
  • 200zx Z31 and Gen 1 model RB20 is NOT supported (unsure, ask)

Chassis: Any application

  • Any Classic chassis
  • Sports cars with no OEM body wiring or Non EFI cars
  • Race cars
  • Cars that benefit from EFI wiring run without body wiring connections

INCLUDED WITH THIS PRO-SERIES HARNESS

  • Main Engine and Transmission one-piece tucked harness
  • External and removable Fuse and Relay block
  • Relay system installed for proper ECCS ON and OFF operation with ECU Memory retention
  • Fuel Pump output wire that connects directly to the pump
  • Starter trigger wire available in the interior for easy and clean install
  • Battery power pick-up at the starter for easy and clean install
  • Ignition input signal from ignition key
  • Harness is designed to keep the ECU in the cabin and will reach both left and right bulkhead openings
  • Relay block includes the Ignition, Fuel Pump and Fan relays. The Fan relay can be reclaimed as the AC relay.
  • OUTPUT connections for ECU tachometer signal, check engine light, engine temp (Nissan dash signal) and alternator charge indicator, reverse lights, speed sensor,   NOTE:  Output signals supplied ONLY – they may need to be conditioned for use with vehicle’s gauges.   Aftermarket gauges may be required. This part of the install REQUIRES connections of the EFI harness to the body/dash/steering column of the car. User must have basic electrical skills to complete this.

HARNESS CONNECTIONS

  • 6x Coilpack connections
  • 2x knock sensor connections
  • Alternator charge cable
  • MAFS connector
  • TPS connector
  • TPS switch connector
  • Boost solenoid wiring with OEM connector
  • 6x Injector connections
  • Cam sensor connector
  • Idle air solenoid connector
  • OEM Oxygen sensor connector (wideband wiring is not part of the EFI harness and needs to be supplied)
  • 2x ground ring terminals
  • Air regulator connector (under intake manifold location)
  • ECT sensor connector and cluster coolant temp switch connector
  • Reverse lights sensor connector
  • Speed sensor connector
  • Alternator connector
  • Starter signal connector
  • OEM oil pressure 2-pin connector (only 2-pin version supplied)
  • Nissan Diagnostics connector
  • Printable install instructions with pictures
  • ** For aftermarket ECUs and Speed/Density conversion, the harness will include an IAT sensor and MAP sensor connectors instead of the MAFS connectors.
  • ** Apex’I PFC conversions ONLY include the IAT sensor on the main harness. The MAP sensor is wired separately, from the PFC box directly to the sensor. MAP sensor harness should be purchased with the PFC
  • Turn Key ENGINE START Guarantee

PRO-SERIES HARNESS TECHNICAL SPECS

  • Plug and Play – installs in minutes
  • NO CORE HARNESS or additional wiring required
  • OEM wire colors used, where applicable
  • All sensor signal connection  use EM shielded wires
  • Fireproof fiberglass sleeving used in high-temp sections near the manifold & turbo
  • Point-to-Point continuity tested on every wire
  • Constructed using exact OEM connectors and seals
  • Made with high temp TXL wire with adhesive shrink tubing (-40°C/-40°F to +125°C/+257°F operating temperature)
  • Wrapped in lightweight nylon loom (-94°C/-137°F to +125°C/+257°F operating temperature)
  • Includes a charge harness and improved grounds
  • Fully tested after production for an easy plug-and-play replacement

Return Policy

 

All items are subject to a 20% restocking fee on all returnable items within the 14 days of the purchasing date depending on their condition when returned.

If you placed an order and received free shipping but returned an item and you no longer qualify for the free shipping, you, the buyer, are responsible for paying the original cost of shipping and the return shipping cost..

What is a reasonable restocking fee? It is the percentage of the item’s price depending on type of item and condition when it is returned. Our restocking fee is 20%.

Type of Return Request

Restocking Fee Applied?

Buyers changes mind, buyer remorse or price difference

Yes

Buyer refuses delivery

Yes

Buyer returns an item but it arrives to the seller damaged, defective or materially different than what was originally shipped by the seller

Yes

Buyer receives an item materially different from what they ordered

No

Order is returned as undeliverable

No but an amount equivalent to the return shipping costs will be deducted

Items arrive to the buyer damaged or defective

No

Buyer refuses delivery due to visible damage incurred during shipping or caused by the carrier

No