JSpec Wiring Harness vs ASpec W.H.
 

Just wondering, but will a right hand drive wiring harness(JSpec) work on a left hand drive car(ASpec)? So if I buy a JSpec TII S5 with ECU and W.H., will I have any problems plugging my new wiring harness to the guage cluster, etc?

Its over rated and more dificult then moding the NA harness to fit actualy using the USDM harness is more work then moding the NA harness to fit when doing a swap. If your not swaping then no it still needs work to fit alot actualy try and find a USDM one.

I am doing a S5 N/A to S5 TII Full Swap, but the engine, ECU, and wiring harness are JSpec (from Japan). will I have problems making the S5 TII Jspec wiring harness(N374), fit a S5 ASpec car which used to be N/A?

My N/A harness is N350, it wont even work with the N374 ECU, or pressure sensor.

From what I've read, the JSPEC EM harness won't *reach* where it needs to go due to it being a R/H drive harness vs your left hand driver car.

From what I understand, it won't have the wires for the Wipers either.

All pressure sensors whether n/a or Turbo are in the same locations. So??????? I don't know what you meant about the boost sensor.

A quick look at the FSM for series five, the FUEL sections F1 and F2 and pages called CONTRO SYSTEM, shows only two wire differences b/t n/a and turbo series five.

One is pin 2M and the other 3R.

2m on the n/a is for the VDI solnoid and for the Turbo is for the Knock Sensor.

3R on the n/a is for the 6PI induction system and on the Turbo is for turbo Duty Solenoid.

Both seem simple to deal with vs what could and probably is a Nightmare if you use the JSPEC harness (relativly speaking).

So from my point of view, use the USA non turbo harness that already exists in your car.

The only thing that I did not look at is the interface plugs b/t the EM harnes and the F harness. Called X-15, X-16 on early series four and called FEM-01, FEM-02 on later cars.

well let's say i'm not as smart as you (LoL) and I couldnt figure out how to make a NA harness work with trubo 2 motor.ecu... then am I better off just finding a US N370 wiring harness?

thanks for the explanation.

Unless someone can prove different, use your present series five non turbo harness on the JSPEC turbo engine. Everything should reack, EXCEPT the two items mentioned in my other post.

Those should pose no real problem. The Knock sensor just needsn a wire run from it to the plug that went on the VDI.

I'd expect the JSPEC engine your gettin will have the Duty Solenoid on it so all you'd have to do is use the elec plug that went on the 6PI on the Duty Solenoid. I'm not sure if it will or will not reack from the 6PI solenoid location to the Duty Solenoid location or not. I'd GUESS it will.

I'd a thought the JSPEC ECU would plug into the USA harness. But I don't KNOW that. You might just be better off with a USA ECU instead of the JSPEC ECU. That is a GUESS. I don't KNOW that for sure.

Anybody that has done this can pipe in ANY time they want to make corrections.

this is a tedious process, but the JSPEC harness will work, you just need to unwravel the sheilding. lay it out over the motor (while its out of the car) and then wrap it back up. you'll have to disect the cover of the harness, play with the guts and sort em out. it's much easier said than done, but it does work. its very hard to find S5 TII harnesses. so if your SOL, you'll have the JSPEC harness anyway. why not give it a shot. label the sensors and be very very detailed and cautious in everything you do.

yes the harnesses are plug and play. jspec ecu => us harness vice versa. i have an ASPEC harness with a JDM ECU. so do others on this forum. it works just fine.

i had a s5 turbo 2 and got a jspec motor and w.h. and just did the swap and now my injectors wont open up. they build up resistance and everything elese works fine. when we put gas into the intake manifold it started right up, but then died obviously from lack of gas. all the wires and grounds were checked and i used the injectors off my old engine so that i was sure they were good. any ideas?

didnt mean to thread whore but it seemed like you guys were sort of on the same topic and seemed to have more knowlege than me on this subject

Your fuel lines are one backwords. ^

Agree with the above. Swap where they attach to the engine.

thanks for all the advice everyone, i think im gonna play with a jspec harness see if that works, if not ill still have the na harness. Will I lose anything else besides the wipers using the jspec harness, or is that it?

you wont lose the wipers. the body/chassis harness controls that function. oh yeah, one more thing. you wont need to do anything to the power harness (alt, starter, battery). the one on your car will bolt right up to it. i was a jackass and took mine apart... obviously realizing after that i didnt have to. just tryin to save you some time and pain

IMO you should modify and use your NA harness, and use the J-spec harness for spare parts (ie, if you have crappy or broken connectors).

About the wipers being lost..........I guess I gave out bad information. I've read a number of swaps where they put a JSPEC EM harness in the car and they say they lose their wipers because the wipers are not a part of the EM harness on a JSPEC, but a part of the F harness. I Assumed they were right but I guess they were wrong.

The wipers circuit IS a part of the EM harness on a USA car though, whether series four or series five.

I guess I'll have to buy a used JSPEC EM harness someday to figure it out.

EDIT: Here, read this thread, this is the type thread that made me think the wiper circuit was not on the EM harness https://www.rx7club.com/forum/showth...t=JSPEC+WIPERS

Actually, all you have to do is look at your JSPEC harnes and either it will or will not have the plug to the wiper motor. As simple as that.

Hailers, those people were right. The wiper motor wiring is in the J-spec front harness, not the emission harness. Confirmed by visual inspection of my car. Saves you buying one... ;)

So then, it's settled, I was right in my first post that suggested if you use the JSPEC harness you'll lose your wiper circuit because the JSPEC cars have the wiper circuit in the FRONT harness, not the EM harness.

Put a JSPEC EM harness in a USA car and you lose the wipers and have to make adjustment to fix that.

thanks guys for all ur info, hope this swap wont be such a big deals when the time comes :D

U have to splice in the windshield wipers and a dash harnes plug aswheal. Ill add more tonight..


Gil..

yea NZ is correct I was going to tell you calm down buddy lnlycrpr dosn't know what he was talking about :anger:

But the CAS location is debatable as they very car to car in Japan.

Dont forget to cut the looped wires in the X16 plug to keep from back feeding on the JDM harness in a USDM chassi harness.

*************But the CAS location is debatable as they very car to car in Japan.********

CAS location varys?????????? Really. Gotta see that to believe that.

I think I have posted pics of that once befor just maybe. But the USDM run through the charge harness and into the chassi harness and some JDM run thru the emissions harness.

What? Ok, how do I learn what X16 plug is, and all this information about the harness? And what happens if I DONT cut the looped wires in the X16 plug?

i have a Aspec n/a 90 rx7 with jdm turbo 2 harness and engine..

it reaches but the wires are little stretched and lay on top of the motor

had to re wire the wiper back in

My last words: Trust me, if you use your old n/a EM harness life will be soooooo much easier.

Sadly I am giving my NA engine, trans, diff, to someone else which ofcourse includes wiring harness and ecu. So I will not have my NA harness to play with, and I dont want to spend anymore more money, this is costly enough as it is, so it looks like I will be playing with the jspec harness.