Complete wiring for RB25det into 95 S14

[FriedEGs]

i know this sounds so simple, but searching through.. i seemed to find info that is still secretive... even for july, 2005?! I haven't started yet.. but i don't want to spend 400 to have someone else make the harness for me... i want to know for my own knowledge, and experience..
Modified by FriedEGs at 1:00 AM 7/8/2005

[Joe]

sorry man nobody has publicly declared the S14-25 wiring yet. its very easy, but unforutionatley im sworn to secrecy with the details. get ahold of the main wiring diagrams that include the main harness to dash harness (F3/M63) plug and youll be golden.

[FriedEGs]

thanks for the reply.... i'm assuming the F3 is the plug from the rb harness, and m63 is from the car (s14)? Also, how many wires are we talking about changing?! 8-10, or more than 20?!

[Bluefire]

The resources are out there... no one out there including me is willing to simply give out plug and play directions. Besides Rb-s14 is cake... just repin the white RB plug to match the white s14 plug and your good to go. And if you do it right your wipers will work also

-Bluefire

[gawdzilla]

thanks for the reply.... i'm assuming the F3 is the plug from the rb harness, and m63 is from the car (s14)? Also, how many wires are we talking about changing?! 8-10, or more than 20?!

nope. F3/M63 plug into each other on the s14 car. one is the male side, one is the female side. basically the concept is to leave the male side in the car and cut off the female side from the KA engine harness. then merge that side into your RB harness and done. more than 20 wires definitely.

[Bluefire]

No need to cut anything on the rb harness. just repin that f3 plug

-Bluefire

[stiergott]

ok time out. your tellin me the power plug from the rb will plug into the power plug on the s14? your not serious(?). i have looked at a pin-out of the f3 rb and the colors dont match the s14 at all, so you cant simply match the colors. it is easy, easier than swaping into a 13, but its not like s13 sr to s13.

[dekand]

it is easier to cut off the rb plug and wire the ka plug onto the rb harness because you can actually see what wires you are splicing together, and it makes really quick work of it, repinning is a just a tad harder/more tedious imo ... it makes for a cleaner install though, so its up to you ...

[Bluefire]

ok time out. your tellin me the power plug from the rb will plug into the power plug on the s14? your not serious(?). i have looked at a pin-out of the f3 rb and the colors dont match the s14 at all, so you cant simply match the colors. it is easy, easier than swaping into a 13, but its not like s13 sr to s13.

who said anything about matching colors. you repin to match functions... tach, speed, start, air regulator, etc... Thats why you need to look at the rb25 harness diagram and f3 pinout.

-Bluefire

[Joe]

correct. the colors arent all the same between the cars so the diagrams are needed.

the LAZY way to do it is to cut the 5 or so wires you need and just not use the F3/M63 plug but then alot of stuff like wipers wont work

but its hella easy

[red240zenki]

Hey FriedEG's. They have the RB20DET swap into the S14 on http://www.rb25det.org in the Tech & Spec. RB20DET, R33 RB25DET and GTR's share the same ECU pinouts. So yea, there you go. It's REALLY easy, just use that guide and you're done.

[300Plus]

is that true? If someone were to follow the RB20 into S14 wiring guide for there rb25det instal would it work correctly?

[300Plus]

Ive got both FSM and I'm about to start tackling the unkown areas in my head. But I would love any extra help, so anyone who has links or anything please PM me or post here. I have to locate a diagram of which plug is which.

[240sxed]

Ive got both FSM and I'm about to start tackling the unkown areas in my head. But I would love any extra help, so anyone who has links or anything please PM me or post here. I have to locate a diagram of which plug is which.

If you look where your s14 ecu is, the stock location in the passenger side kickpanel. Theres a f3/m64 plug thats located on the metal part of the wall. its plugged into another panel with a swinging hinge that locks in the harness. You'll know it because it has about 36ish wires coming from it. It is also next 2, 2 fuses the ign and... something else for the stock s14 stuff.

[300Plus]

Yeah I've got it all laid out in my head and I think I can get it done. Thanks for the help fellas

[stiergott]

thye're right it was cake. if your workin with an r33 and an s14 and it takes you longer than an hour, your thinking too much.

[FriedEGs]

Hey, thanks for all the info so far...

I do have one more question. Is this information in regards to using the 240 gauge cluster, or the skyline cluster?!

(I have an R33 into a 95)

[red240zenki]

You can use either of the gauges. From what I know, you can swap in the Skyline gauges cluster and it fits pretty good, but tight. It fits much better in the S14 than the S13. You can also use the S14 gauge cluster. The only thing that will be off is the tach and speedo. Which both you can get adjusted at a Speedo shop for reasonable. Hopefully that answers some of your questions.

[Joe]

if you choose to use the R33 cluster you need to rewire everything on it.

the wiring for the cluster takes 5x longer than the wiring to get the engine running.

the S14 cluster will work but resistors are required to make the speedo and temp read correctly. (id personally do the resistor for speedo, then get an aftermarket water temp gauge)

[dekand]

yeah but the gauge cluster wiring is SO worth it... it only took me like 2 hours, not long at all in my opinion for the end result. EVERYTHING works on it, speedo (though in km/h , ive gotten used to it easy) , tach works, fuel gauge, oil pressure, boost, temp... all the warning lights, etc ... if you have a s14 and a r33 cluster i dont think you have a choice.. just do it like nike

[eh?]

the S14 cluster will work but resistors are required to make the speedo and temp read correctly. (id personally do the resistor for speedo, then get an aftermarket water temp gauge)[/QUOTE]

Speedo works correctly on the S14 and the temp gauge you'd just use the KA sensor. You can adjust the RPM with the screw on the back of the TACH to get it close to actual. There's really no reason to use the R33 cluster, other than it looking nicer.

[dekand]

if you have it it makes no sense not to use it ... i could understand buying it, unless you could get a cheap one yea stick with the ka... but it does have its advantages like i listed above... and does look nicer, but its up to the owner, just puttin my 2 cents in as usual.

[NOT_A_KA]

Ok it has taken me more than an hour to wire this up. SO I must be thinking to hard. I would greatly appreciate if someone could compare my wire connections before I try to start it up. I rewired the F3 plug on the RB harness to match the KA M63. (pinout removed, dont want incorrect information out there -Kamin)

[300Plus]

Someone please review and let us know if its acurate!!

[stiergott]

its not even close.

[HotWIRED]

I didn't check them all, just the power and fuel, tach, VSS pinouts. I would change these, RB pin (12) to KA pin (1) << IGN power, also the grey wire for the injectors if you have the 1ST gen RB25DET. RB pin (4) and pin (24) to KA pin (17) <<ECCS power relay>>. The KA pin (18) is just power to various sensors. If you have the '97-'98 KA service manual check pages EC-97 and EC-212 for the IGN SW diagrams. Also check page EC-240 for the ECCS relay diagram.

[300Plus]

Make reviews/correction to his file and repost

[stiergott]

the brown ka sensor wire does not work too well to powe the rb sensors. connect the rb blue/white(boost, o2, iacv) to ka black/yellow(iacv). i was having a fast idle/rich/hard start problem with the rb blue/white connected to the ka brown wire.

[NOT_A_KA]

On line 23 under the "RB F3 repin to match KA M63" tab, it already has pin 21 Blue / White connects to pin 10 Black / Yellow. Is this what your talking about? Also, did you confirm all the other connections to be correct with your current setup?

[NOT_A_KA]

I didn't check them all, just the power and fuel, tach, VSS pinouts. I would change these, RB pin (12) to KA pin (1) << IGN power, also the grey wire for the injectors if you have the 1ST gen RB25DET. RB pin (4) and pin (24) to KA pin (17) <<ECCS power relay>>. The KA pin (18) is just power to various sensors. If you have the '97-'98 KA service manual check pages EC-97 and EC-212 for the IGN SW diagrams. Also check page EC-240 for the ECCS relay diagram.

Corrections made, Thanks HotWIRED.

(pinout removed, dont want incorrect information out there -Kamin)