rb25det wiring help

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

I was wondering if anyone know what these wires are? I know that they are the main harness conection but which connect to the bottom harness of a KA the colours areblack/ white lineblack/ grey spotslight blue/ grey spotsgreen/ red line/ gret spotsyellow/ grey spotsgreen/ orange line/ grey spotslight green/ grey spotsblue/ white line/ grey spotsgreyblue/ red line/ grey spotsand a black tube with these wires in itblue/ white line orange/ blue line

Post by **xjon** » Tue Aug 24, 2004 5:58 pm

· 8. RB lower engine harness olive plug, connect the Black/White wire (Starter Ground?) in this plug to the Black/Yellow wire from the KAGrey plug at the bottom of the fuse box near the battery location. This is the only thing to connect in the engine bay in this 8 step wiring.Continuation of Wiring:9. RB white plug Red/White wire (AF10 Check Engine Light) connect with KA ECU plug Red Wire (#24 Malfunction Indicator Lamp).10. RB white plug Yellow/Lavender wire (MF01 Tachometer Out [#7 on ECU]) connect to KA ECU plug Yellow/Red (#2 Tachometer) and RSM Yellow wire. There are 2 Y/L wire at RB white plug so make sure you attach the right one.11. RB white plug Yellow/Green wire (MJ04 Hicas Diagnostic Wire/ Speed Limiter) connect to KA ECU plug Yellow/Green (#32 Electronic Speedometer) and RSM Pink wire (connect close to ECU) and Purple wire (connect distal to ECU). Note: Speedometer on RSM is km/h and mine is completely inaccurate. I am using my KA electronic HUD speedo in km/h and it is 10 mp/h off. 12. RB ECU #59 Black/White connect to RSM Red wire (Ign Power).13. RB ECU #50 Black connect to RSM Black wire (ground).Note: steps 12 and 13 you can actually connect at the RB ignition relay. That is one of the 2 relays located close to the ECU.14. Check the wire color for the engine temperature gauge at the back of the KA gauge cluster and connect it with the RB temp wire. Sorry, did not make note of the color.15. Connecting speedometer wires at engine bay: RB lower engine harness Grey plug, take Grey/Red and Yellow/Purple wires. Find KA Grey plug (mine was clipped to the side of the fuse box) which contains Yellow/Lavender and Yellow/Black wires. Connect Y/B to G/R and Y/L to Y/Pu. See picture. The KA wires came from that plug next to my little finger.

Dvorak- See step 8 and step 15. Those are the wires needed to be hooked up from the rb lower harness. If you want some pics check out member's rides. I think I have some pics of these wires I connected. WDPalmer is suppose to update the sticky with pics but I guess he's been busy.

Post by **xjon** » Tue Aug 24, 2004 5:58 pm

Seeing that none of those wire colors match up to what I just posted, I guess you don't need to hook those up. Now I am not so sure.

Post by **S13Sil-line** » Tue Aug 24, 2004 5:58 pm

xjon wrote:· 8. RB lower engine harness olive plug, connect the Black/White wire (Starter Ground?) in this plug to the Black/Yellow wire from the KAGrey plug at the bottom of the fuse box near the battery location. This is the only thing to connect in the engine bay in this 8 step wiring.

What do you mean the only thing to connect in the engine bay in the 8 step??? What about step four and step five??? The RB white plug...Is that the plug your referring to in step 3?

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

Dont use the RB lower, not even for a second, you are WAY OVER COMPLICATING THE PROCESS.

You only need the knock sensor wiring from the RB lower and the oil sender plug.

USE THE KA LOWER HARNESS!!!!!

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

I am using the KA lower harness on the RB but, the wires that are cut in the pic are the RB25DET main harness. I need to know which ones on the RB main harness plug to the lower KA harness.

Post by **S13Sil-line** » Tue Aug 24, 2004 5:58 pm

Ok Jon, I'm real confused here. The harness that goes accross the transmission should be the ka??

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

Yes, thats right, use the lower KA harness, take the knock sensor wiring off the RB lower(RB25) and tape it to the lower KA harness, then swap the oil sender plug splicing the yellow/white wires together. If you are using the RB gauges, the make a run from the skyblue wire to the cluster for the actual oil gauge. THe yellow/white is oil dummy light, skyblue is oil gauge.

If you do this, then the reverse lights, speedo, starter, and alternator wiring is DONE!

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

the wire that i have in the pic i need to know which ones those are. the wires in the pic are part of the RB25DET main wiring harness, those are the ones that plug to the maf and to the lower harness, but i dont know which ones. if anyone know, tell me of send me a pic of your lower harness and main harness connection.

Post by **Bluefire** » Tue Aug 24, 2004 5:58 pm

Where exactly did those wires come off of.... Can you post up a few pics of the harness and where those wires are from? Maybe we can help you better that way

-Bluefire

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

The blue/white or orange/blue sounds like the wiring for the O2, but there is a wire with clear insulation that is the signal wire....

What you need to do is check each wire for continuity at the ECU and see which pin they go to...then you can figure out what is what. Dont believe anyone else until you do this.

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

does anyone have good wiring diagrams or could send me some pics of there main harness connectting to the KA lower harness

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

Main harness means what? The only place that the KA lower connects to the RB upper is the knock sensors...the rest is all for the car.

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

here are some pics, the wires that are cut are part of the the RB's main wiring harness, and the wires with a clip is the KA lower harness, the RB's cut wires are to connect to the KA lower harness but i dont know which ones because when i bought the my clip the wires came cut, can anyone help me.

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

the KA connection

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

that plug is not on the KA lower harness.

Post by **Bluefire** » Tue Aug 24, 2004 5:58 pm

Where is your harness cut???

-Bluefire

Post by **S13Sil-line** » Tue Aug 24, 2004 5:58 pm

Whats the difference in the Series 1 harness layout? Can you do a drawing on the Series 1 like the onle above?

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

I have a series 1 engine, my hareness is cut at the, to lower harness i need to know were they connect to the KA lower harness plug. yes that is the KA plug, i have a S14 not a S13 so the both look different.

Post by **JonPowell** » Tue Aug 24, 2004 5:58 pm

Gotcha, you are on your own then...

My suggestion, is to CHECK CONTINUITY BETWEEN THE WIRES AND THE ECU, THEN REFERENCE THE ECU PINOUT TO DISCOVER WHAT THE WIRES ARE FOR....

But dont listen to me, just keep begging others to help.

Post by **S13Sil-line** » Tue Aug 24, 2004 5:58 pm

Hey Jon. You see that diagram that Bluefire did. What is the difference from that to the series 1? i looked in my engine bay today and I could see a lot of similarities.

Post by **Bluefire** » Tue Aug 24, 2004 5:58 pm

Since your saying the plug to the lower harness was cut, couldn't you just get the plug that matches up with it on the lower harness, and just match the wire colors? Anyways if that plug goes to the lower harness, doesn't it just go to the knock sensors only? On my SII, when I removed all the electrical tape, that plug only went to the knock sensors and did not attach to any other plugs

-Bluefire

Post by **p_dvorak** » Tue Aug 24, 2004 5:58 pm

no, it doesn't go to the knock sensor it has its own plug by the intake, i dont have the plug can anyone send a pic that goes to the lower harness.

rb25det wiring help

rb25det wiring help

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