Installation Tech Documents

If you have any issues or questions while installing our products, please call or email us BEFORE touching any of the wires including cutting and splicing. Usually harness alignment is off due to installation error and not manufacturing error. If we did make an error, we are always happy to make it right so please call us with any questions! Check out the iWire Waranty to see if your product is covered. 

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Don't see the answer you need below? Check out the iWire Blog. 

Merge Help Docs

​V5-6 Swap Help Document

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USDM 02-05 WRX Help Document

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USDM 04-06 STi Help Document

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USDM 07 WRX and STi Help Document

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iWire Subaru Wiring Harness Install Video

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Fuel Pump Controller Install Guide​

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DBW Relay and Starter Relay Mounting

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Commonly Confused Plugs

818 Help Docs

Drive By Wire Engines

Non Drive by Wire Engines

Headlight Accessory Kit Install Document

General Help Docs

How to Install a Pigtail with Crimps

How to Crimp a Terminal

How to Depin a Terminal

Product Help Docs

DBW Pedal Adapter Plate Install Video

Grounding Kit Install Video

Wideband Install Video

Wideband with Gauge Install Video

Mounting Hardware Install Document

Intercooler Splitter Install Document

FPC Hardwire Kit - Stud Kit

Fuel Pump Hardwire In-Tank Kit - 02 to 07

Fuel Pump Hardwire In-Tank Kit - 08+

FPC Hardwire Kit - Radium Single and Double Pump Kits - 02-07

FPC Hardwire Kit - Radium Single and Double Pump Kits - 08+

AVCS Install Guide

Note: We do not post our AVCS Install Guide online. The link to the instructions are included in each kit. If you lost your instructions, please email us at

DCCDPro with iWire PnP Kit Help Docs

VSSPro PnP Kit

How to Use the DCCDPro Controller

Manual Controller PnP Kit

Spiider Controller PnP Kit 

Spiider PnP Kit - STi Cluster 2001-2007

Spiider PnP Kit - V5 and V6 Cluster

DCCD Plug and Play Kit - Wiring Only

DCCDPro.com Initial Setup Guide