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Old 01-09-2012, 08:17 PM   #1
Scooby Newbie
Member#: 291684
Join Date: Aug 2011
Chapter/Region: NESIC
Location: Dutchess Ny
2004 Rs (Wrx Swap)
San Remo Red

Default 02wrx engine 04rs harness??

Ok so my problem lies here.
I originally was going to swap out the entire 02wrx harness, but i later found out this would mean not just the bulk harness but rather rewiring the entire car. Therefore i decided i would much rather merge my 2004 rs harness with the 2002 wrx harness, keeping the 04 rs harness.

I decided i did not want to mess with the wiring as i REALLY dont want to mess it up, so i contacted the main wiring man for east coast swappers, asking the cost to get it merged.

He told me that i wouldn't have to get the harness merged as those two particular harnesses were plug and play.

My question is what about all the turbo sensors on the 02wrx, do they run to that 5th plug on the wrx ecu that the rs ecu dosent have?

Also what about the fuel pump controller will that match up?

I asked the man himself but he hasn't replied in a while, and i need to get this project done, so can anyone help me out?

I trust that if he is a professional wiring guy he is correct but i dont know what to do about the turbo sensors and the fuelpump controller.
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Old 01-10-2012, 10:18 AM   #2
Scooby Specialist
Member#: 107569
Join Date: Feb 2006
Chapter/Region: NWIC
Location: Vancouver, WA
1998 Forester S


All of the harnesses need to be swapped to the wrx. Including the front, rear and bulkhead. You will also need a FPC and all the WRX sensors.No need to merge though. Just get everything from the wrx.
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