[aifan27]

Hi guys,

I was just wondering if you need to merge the full wiring harness or just the engine harness for an '01 2.5RS --> '04 WRX swap. I was thinking about buying a pre-merged wiring harness and just wanted to know if I need the whole thing or just the engine section.

Thanks.

 

[camaroz1985]

You need the bulkhead harness merged. The engine harness is just the 04 WRX stuff. The bulkhead harness basically joins anything engine related to the rest of the car.

 

[aifan27]

So if I bought full pre-merged wiring harness from front to back I will end up using all of it or just sections? I'm kinda confused.

 

[camaroz1985]

If you bought a pre merged harness it would most likely be just the bulkhead harness and maybe some additional wires for things like the fuel pump controller.

 

[JoeMack]

how many other wires merge from the engine to the bulkhead harness? I can't see many wires off the top of my head.

I mean with my engine harness disconnected everything else still works... At least when I disconnected it when I did my trans swap.

Please fill me in guys.

Thanks

 

[aifan27]

If you bought a pre merged harness it would most likely be just the bulkhead harness and maybe some additional wires for things like the fuel pump controller.

Oh okay. Thanks for the help, I appreciate it.

 

[camaroz1985]

how many other wires merge from the engine to the bulkhead harness? I can't see many wires off the top of my head.

I mean with my engine harness disconnected everything else still works... At least when I disconnected it when I did my trans swap.

Please fill me in guys.

Thanks

That seems right. I'm no expert, but from what I have been through it seems that that is correct.