Is the body and dash harness different between the na and the t2? I am getting ready to do a swap, and I was just curious if it is only the ecu and engine harness needing replaced, or if the body and dash harness need replaced also.

 

The ecu definately does because you'll be dealing with boost also the wiring would either have to be spliced, or just get a t2 wiring harness.

 

only engine harness and ecu, just get and after market boost gauge. in my swap i ended up having to swap out the entire rear end, the swap has been a pain, one problem after another. hope everything goes good for you

 

The plugs are the same the harness wires are not all the same. The ECU is the same but one sees boost one does not outside of the N338.

 

So I am still confused. I already knew the engine harness and the ecu was different. So are you saying that the body harness will just plug right in and work fine and I just swap the ecu and engine harness.

 

yep only swap the ecu and engine harness everything else will plug in. only way you will need to swap out the dash harness is if you are planning to use the T2 gauge cluster, but like i said before just buy and aftermarket boost gauge.

 

No not all the wires are the same on the dash harness. If you use the TII harness new wires need made and some cut to stop back feeding in other circuits.

Best way is to use a NA harness with TII ECU and lengthen a couple wires in the engin bay.

 

Listen to IceBlue. He is right.

The Turbo harness WILL mate with the n/a front harness (the damn one inside the car if you don't know). BUT the wires in that Turbo harness (it's really the Emissions harness) don't ALL have the same function as the ones in the n/a EM harness.

Attached is a jpg or two of the plugs that mate together b/t the EM harness and the Front harness. Those wires that are PECULIAR to the turbo will have parenthsis (sp) around them.

So looking at those two attached jpg, you can see there are some differences. Not that hard to overcome . What you do is move a couple of wire arournd and/or cut one or two.

By the way, the most serious, bad ******* thing, that can happen if you mate the turbo harness with the n/a, and make no changes to the wiring, is that the meter fuse will be putting 12v on the the Boost Sensor output wire and also the boost sensor input wire to the ECU pin 2B. Normally that pin 2B NEVER sees more than three volts dc.

Also you'll now not have a water temp gauge reading (if changes to the turbo harness are not made), no input to the alternators two small plug therefore no control to the alternator.

NOWHERE did I say you could not put a turbo EM harness in a n/a. BUT you need/should/have to make wiring changes to the turbo EM harness if you do do you don't screw the kitty. JPgs attached of the two plugs that are located on the EM harness and mate with the F front harness.