Rb25det to S14 Wiring

Discuss the RB20, RB25 and RB26 series engines.
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240sxed
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Yes, I've searched, but everything is kinda wishy washy not quite clear as some people would like. Can I ask for clarification?

Things that need to be wired:

ECCS Relay , the blue relay in s14s, it needs to be wired to the correct ECCS on the rb

The Ignition - ignition signal, on etc to the correct wire on the rb

Fuel pump - definitly just need this , its a black-yellow wire on the s14...right? its only one wire, no additional ground, just the relay wire?

Tach - needs recalibrating/ or that resistor thingy

speedo - should work fine if you use the KA lower harness? er... so use the USDM KA speed sensor in the transmission, or use the harness?

Oil Pressure sender - Im confused on this, but splice the ka lower harness, or use the skyline harness.

Alternator/fusebox/starter/grounds - Use the KA lower harness? I know it plugs into the battery box and such obviously, but do the plugs fit on the alternator and such? if they don't do you just splice them with the skyline alternator plug and stuff?



Joe
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I dont have my notes with me so i cant give you colors or pin locations but ill help the best i can.

ignition - you need to jumper a wire between the F3 and M63 plugs under the dash. its where the main ECCS harness and dash harness meet down by the ecu (funny white plug) it gives the ECU the "on" signal from the ignition switch.

fuel pump - all we did for the fuel pump was ground one of the wires on the relay on the drivers side. it makes the 2 second KOEO (key on engine off) prime not work because the pump is always on with the key instead. but it works.

tach - yes, or a skyline cluster

alternator/box - this is where my swap got a little weird. my lower skyline harness was in real bad shape. the shop i origionally sent my wiring to destroied my S14 wiring and never sent the lower harness back with my unfinished, non working RB wiring so i had to pick bits and pieces off my skyline harness. i used the lower skyline harness and fixed what i needed to. never wired the alternator and the only thing that came off the fuse box plugs was the starter solenoid signal wire. connected the alternator to the direct to the battery instead of the fuse box. i dont question it, i know it works lol.

gawdzilla
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i literally just did my wiring (rb26 into s14) within the last few days, so you're in luck cuz things are fresh on my mind i know how you feel when you say things are vague. when ppl say to connect this color wire to this color wire, it isnt too helpful.

first thing to do is realize the F3 plug pinout in the s14 manual is WRONG. once you figure out the correct pinout sequence, use the female side of the F3 plug. the concept is, cut it off from the KA harness, and merge the F3 plug into the RB harness. when you're done with the soldering/merging, plug the F3 plug back into the body, and bam you're done.

ECCS relay- use the one that comes with the rb, merge it in. forget about the KA one.

IGN- yes, you need it. grab from F3.

Fuel pump - i dont remember the color, but search the s14 manual and you will find the pin on F3 to use.

Tach - also from F3

speedo - surprise! F3. HOWEVER, the signal for it is sent through a plug by the fuse box. USE the KA setup and the signal will reach F3.

Oil Pressure sender - the only thing you're going to be getting from this is the oil light. use the RB one sensor side, but use the KA fuse box area plug.

Alternator/fusebox/starter/grounds - use the KA. alternator plug fit my alternator. solder the RB's starter side plug to the KA lower harness. grounds use the KA. use the KA fusebox.

the key to the wiring for s14 is to USE F3. hope it helps. i know the manual doesnt show all the pins for F3, but i created a spreadsheet w/ all that crap mapped out. let me know if you want it.

good luck

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240sxed
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great man, the thing about what other people were sayiing was confusing. And now that I know you use the lower harness on the KA to plug everything up I feel that its more similar to a swap i've done.

As far as like the wiper motor and stuff...how does that integrate? I know that the wiper motor is connected via the engine harness not a lower harness on the KA. What do you wire it to?

gawdzilla
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seperate the wiper motor and abs (if applicable) out of the KA main harness and repackage it into the RB harness. the only soldering you need to do is perhaps connecting some grounds. the wiper motor runs through the F3 plug. just make sure you DO NOT cut those off when working with the F3.

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red240zenki
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Also, if you look on http://www.rb25det.org there is a M63/F3 pinout guide and RB20 swap into an S14 guide. I used both of these and they are accurate. It's in the tech and spec section.

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240sxed
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ahh do you have a rb20 or rb25?
red240zenki wrote:Also, if you look on http://www.rb25det.org there is a M63/F3 pinout guide and RB20 swap into an S14 guide. I used both of these and they are accurate. It's in the tech and spec section.
,


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red240zenki
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I have a NEO RB25DET. The RB20 and RB25's, except the NEO have the exact same pin locations on the ECU. I just used the guide to reference what wires I needed to splice together. It's fairly easy. Just grab the RB25/RB20/RB26 ECU pinout, the M63/F3 (same thing) pinouts, and that guide and you should be good. Everything on the wiring is on that site.

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T_love
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sorry for the slight hi-jacking but i have a question that's sorta inline with one of yours. When i did my wiring, i separated the wiper wires and left them alone but i might have ended up cutting one of them somewhere. My wipers work but i have no intermittent wipers and they no longer return to the bottom if you turn them off while they are in motion. Does anybody know which wire i might have cut or if i need to connect something somewhere?

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JonPowell
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Wiper amplifier box...plug it in.

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T_love
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JonPowell wrote:Wiper amplifier box...plug it in.
Where is it located? i only see the RB one which is in the engine bay attached to the harness but i was trying to keep the wipers working the stock way. It wouldn't happen to be somewhere under the dash on the passenger side, would it?

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240sxed
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the Wiper amplifier shouldbe on your s14, it originally came on the KA engine harness. Its a brown box...about... say 3 inches by 3 inches by 2 inches height. One plug going into... i wanna say 3-6 wires goin in.

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red240zenki
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It should be right behind/next to your ABS if you have it. Or right in front of your wiper motor. It's a brown box with a yellow sticker on it I believe.

Ramius83
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And for a little more direction where it is. It is directly behind the passenger's side strut tower, tucked in a little crevice directly to the left of the wiper motor. If you still have the cruise actuator/pump installed, you may have to move it out of the way to get to it. Without it, as you said, you will have no intermittent wipers.....

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lyon23
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T_love wrote:sorry for the slight hi-jacking but i have a question that's sorta inline with one of yours. When i did my wiring, i separated the wiper wires and left them alone but i might have ended up cutting one of them somewhere. My wipers work but i have no intermittent wipers and they no longer return to the bottom if you turn them off while they are in motion. Does anybody know which wire i might have cut or if i need to connect something somewhere?
I had the same problem and Nick also.. just ground the wiper motor and the wiper amplifier...on my s14 the amplifier was behind the cruise control pump goin like inside the pasenger fender

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240sxed
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goodie, Now i don't have to worry about how to hook up my wiper stuff when i get my motor =)

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T_love
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Thank you, all. I/m so happy to finally get my wipers functioning normally. I was getting sick of having them stop in the middle of the windshield, not to mention the embarassment.

I don't understand why the ground was no longer there on the wipers since i made it a point to separate all those wires and try not to cut them.

Oh well, i have them working now, that's all that counts.

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240sxed
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Ok, so everything sounded a little easier than it seems.

Does anyone have the (m3 pinout[thats the white harness next to the r33 ecu harness right] [m63 is the white harness next to the ka ecu ] ? ) if thats not the name, im looking for the pinout on the white plug on the r33 harness right next to the ECU, the ECM plug?

So.. im doing 98 s14 to series 1 rb25det.

The fuel relay if im not mistaken I have to go on the drivers side to get? I take black pink and black and yellow... and run it over to the m63 slot...for fuel power? I know theres one pinout for fuel power, but i've got black/yellow and black/pink what goes where?

ECCS relay, 2 reds, , 1 black/white, 1 red/black. Ok so the red/black goes to the orange eccs power on the ecu. The 2 reds...not sure? the black/white goes to another eccs on the ecu?

Pin #1 (12 or 14 gauge wire) black/red on m63 connector goes to pin#59 on r33 ecu for ignition power?

Can anyone give me a little help on the specifics and where to find what?

I've cut off the m63 plug off the ka harness and figured i'd splice wires into that, and just plug it back in the stock location...right? =D

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240sxed
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Oh otherthing, the lower harness is all done, it was mainly plug and play... wish the other wiring was that easy.

dekand
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240sxed wrote:
I've cut off the m63 plug off the ka harness and figured i'd splice wires into that, and just plug it back in the stock location...right? =D
correct.

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240sxed
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Can you help me with anything else, such as a pinout for the r33 plug?

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T_love
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i don't think i've ever seen the pinout for the R33's 'F3'? plug anywhere. The wires from the ECU you can figure out with the ecu pinout, most of the wires going into the engine bay you will need to use a multimeter to figure out which one is which. I wish i could have kept track of the colors and whatnot but you should be able to figure it out by just testing with a multimeter

Fuel pump, i never pulled any wires from the driver's side. I know there was a wire i connected but it was with the rest of the wires.

ECCS relay, don't quote me on this, two red wires go to constant power wire. I think its red also. I thought the red/black (thick wire) goes to the red/black on KA plug. don't really remember though

Its been a while since i looked at my wiring so i don't remember it that well but i'm sure if i'm wrong somebody will correct me. Try to throw in some pictures if you can, that'll make it a little easier to figure out
Modified by T_love at 4:25 PM 5/30/2005

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240sxed
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Ok ok... So the fuel pump relay works, i hear the fuel pump prime.

Now, I know I am NOT getting spark, but the little ecu light is on when the key is on power.

I connected Pin #1 on m63 harness to pin #45 on the ecu (these are both black/red thicker gauge wires)

f2 (ka eccs relay)#2 red/black to R33 ECU pin #16

#3 black/white to r33 ecu pin #49 (the guide that im using says after that, 109,59 , cas, afm-eccs relay power out put)

#1, #5? both red wires, connected that to ecu backup pin #58 on r33 ecu?

what am i doing wrong, am i missing an ignition wire? can someone help me with the difference between ecu relay, ecu backup power, ecu power?

Anything to help with the ignition/eccs wiring would be appreciated, or if theres any other reason why I wouldn't be gettin spark... I kept the ignitor chip out untill i test it to avoid blow it.

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T_love
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do you have the gray wire for the injectors connected? It took me forever to realize that it was the reason why mine wasn't starting. BTW, is the starter cranking at all?

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240sxed
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Yep starter is definitly cranking. It cranked before I had the ecu plugged in =), im guessing b/c of the lower harness.

What does the gray wire look like exactly...and where do i connect it?

would anyone be willing to help me out on

aim or the phone?

aim: l240sxedlcell 415-568-5551

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T_love
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just saw your other thread so i assume you found the gray wire

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240sxed
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yep it was up in the cutties


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