Well i bought CoandCa's car he apparently had some problems with the wiring......i have purchased a new Ka24de wiring harness and plan to start over (old harness was too messed up to continue with) wish me luck and i could use all the wiring help i can get i have looked at all the wiring info on the forums but any tips would deff. be helpfull

Luck!

I'm really enjoying the KA in my mkII. It really is a fun car now.

yeah man that ka24de ive heard has some torque to it so im gonna be extatic when its finished

im also looking for any body mods that can be done to this car i have seen quite a bit of pics with cars like this that have kits but i have heard that you kinda have to make your own any tips on that would be helpfull aswell thank you to all that help me along the way and props to club S12 if it were not for you guys i would be completly lost

OK here goes the questions apparently coandca redid all the ca20e relay wiring could i just get a relay box from a KA24de 1993 240sx and use it what i mean is does the relay box to a 240 just have a plug that plugs into the bottom of it or is it all seperate wiring

lol, its all separate. if he put new relays in, just use those

thanks man i was looking it over in the manual today while on my lunch break and your right it is all seperate but on the relay how can i tell which side is the electromagnetic side for the ground?

i will be writing down all of my wiring and how i did it. so when i get this thing running then i will post a good "mk1" wiring sheet for the Ka24de hopefully it will be finished by this weekend or next

HA! Good luck. I thought that way too...

This better happen lol

WHAT!!! do you think that this cannot be done or what?

Pffft, he's just a giver upper

you must have patience in this matter if it was done on an MK2 then why can it not be done on an MK1? its basicly the same wiring just different colors and plus i have ordered the factory manual for the MK1 aswell so i will have MK1 diagrams to work with as well as ka24de diagrams so whats to stop me? unlike you eternal newbie i dont have a mom breathing down my neck nor do i have a rental space lease up like in coandca's case
its only a matter of time and i promise that this is not the impossible

bitchezzzz, just got my KA sucessfully started. it had a bad dist at first so i swapped one i had laying around. and started right up. all you really need is power to the ecu, power to the ign coil/injectors(theyre the same wire) and the start signal which richens it up for smoother starting. pretty easy. id also hardwire the fuel pump because the s12 has the gayshit variable voltage bs

Of course its not impossible it is just a bitch.

retracted

now thats what im talking about hell yeah rage you rock now only if we could get a good wiring sheet out of ya that would be great!!!

Not to hijack, but rage, how did you hardwire the f.p.? I have a harness made... I just need to run a +12 to the fp. I still don'tknow what wire to tap into. Ugh haha

well, since im running a walbro, i hardwired the positive to the battery with 10ga wire and a 30a fuse, and then im using a relay to turn it on with the ground. i honestly dont know how the stock bs works

Oh okay. I'll figure it out haha

what did you wire the start signal to?

http://www.club-s12.org/forums/index.php?showtopic=19260

thanks eternal newbie i appreciate that

ok one more question.......can i use an aftermarket ignition coil with this or do i have to use one from the factory

GOGOGO Blaster SS coil now =D

And BTW the +12 for the fuel pump is Orange with brown (red??) stripe.

so can i strait wire the ignition coil to the battery or to a relay w/o the power transister? or do i need the diode the power transistor and all that and if i have power to the ecu does that mean i have power going to the coil and fuel injectors

If you could post wiring info, that'd be great.. I want a KA bad

for the start signal on the ecu, you put it to the starter wire on the ignition key thing, for the starter to start, same thing, id use a big relay for that though.

ok ive kinda gathered that from other forums its the b/y wire that runs from the column
through to the starter and thank you for clearing that whole mystery up but my question is "does the ecu supply the power to the things like fuel injectors,dist.,coil, and also and am i doing the right thing by hooking the power to the ecu strait to the fuse box

i would put the ecu on a fuse and relay

the ecu only powers itself, the injectors and distributor are on the black/red stripe wire, and this is on my 95 stuff, so it has internal coil

thank you that helps quite a bit but im still confused as to what an internal coil is but that prolly dont matter ive got a 93. so i need to run the b/r striped wire to relay then? and one more thing how do i hook up a relay still dont know how that works either not to be stupid or anything but help there would really be appreciated

This came out of a conversation that I had with someone. You should download the FSM on this site if you don't already have it, as I reference it by page. There is probably excess info in there because I was answering a specific question, but you will get the idea. Here goes:



OK go to page 581 of 784 (EL-6). It has the pics of relays with their electrical diagrams. Lets go with the simplest version, the blue one, the pure relay.

OK this is really cool! lol. Its really the basis of many things electronic, and used in many applications on the S12. In the pic, column 1M, you see that the terminals are labelled 1, 2, 3, and 5. What the hell happened to four is a mystery lol. What is even more badass is that if you unplug the relay those numbers are actually molded into the part right by the metal terminal! Anyhow, notice that 1 and 2 are connected by the winding coily looking wire. And notice that 3 and 5 WOULD be connected if that bar was touching the two round dots. What happens is this When an electrical current flows through a coil of wire (what we see there) it creates a magnetic field which pulls little metal bars towards it. What then happens is terminals 3 and 5 are connected and the circuit is complete!

SO basically, 1 and 2 are the switch side. You flip the switch, in this case the ignition, and 12V go through the steering column into that coil of wire and to ground (lets just assume that is #2). Then say #3 has 12V to it all the time, through a fuse, and now that bar is pulled to connect the #3 and #5 terminal, and 12V can flow through the relay out of #5 terminal, which would usually be electrically dead. Where does it go?? Anywhere, starter, headlights, power antenna, anything really The ground from there is after the device the relay is controlling. All the relay does is allow power to be SENT to a device, so....

THERE HAS TO BE A GROUND ! Relays can work, but say for example the ground wire for our headlight is fubar, then the headlight has its 12V power but it has no where to go, so no light. This is why it is critical to have power AND ground both working good.

Now what is really cool here is that you can configure the relay to do other things, I'm sure you've checked out the other pics on that page. You can use it to send power to one OR another different place (1T), use it to send power to two different separate circuits at the same time by the same switch(2M), or activate one circuit WHILE taking power away from another (1M-1B). Take a look at those, the black and gray ones, and tell me what they could be used for.... correct! The headlight up/down circuits, power UP, Now OFF, power DOWN, etc. That is what all of those relays on the other side of the car are for Alot of extra, really.

This is why I love Nissan lol. You don't need this book to check these, now that you have the knowledge of how they work, why? Because Nissan was actually cool enough to have those pics engraved into the mold for the tops of the relays, and have the terminals labelled underneath so we know which terminal does what Its great, really. I don't know of many car mfgrs that do this.

But on from the bla-bla. What is important to you is whether the damn thing is working. Your first clue is that it clicked, good. That means power SHOULD be getting through the switch side of the circuit, from the ignition switch, so power should be going through the relay out to the computer. (notice how there are other wires there, power is going to other places, like the fuel pump.) WHAT you have to do is this: Armed with this knowledge, use the voltmeter you have to check the relay. Make sure that the coil part of the relay has power going through it (call me if you aren't sure how to set this up, its hard to explain) and that when it is powered up, that power is flowing through the other terminals of the relay (where the bar would connect them in the electrical diagram). If you flip to page 173 of 184 (EF&EC-59) it goes over how to look at the computer connector and EFI relay and test them. I would think there would be more than one power supply, but...? Either way, this test is done with the plugs disconnected from the ECU. Very important. Also, before disconnecting the computer from the harness make sure the key is in the 'off' position and then disconnect the battery. Other ways of doing it can cause harmful voltage spikes to the computer.

There are many things in a circuit that can go funny resulting in poor performance, really other than what they have listed. Things like- the connector is not firmly mated with the computer/other connector, the metal pin is not firmly touching its mate, the wire is loose/breaking where it connects to the metal terminal, the wire has internal damage along the line (a killer to find if the car has been thru an accident and its hidden by the repair), the ground has corrosion slightly between the ring where the screw passes through and the body, etc., etc., and so on lol. Really tho Nissans are built pretty well, and wierd shit problems like these don't really happen as much. It of course depends on the particular car and history, which is always a bit of an unknown. The key to finding these unusual problems is the voltage drop test, which is easy and simple, I can explain it if you like. Next time tho. This is a lot of info, look at it, and come up with some more questions, because this is just a start. Something is in your system, we just have to find it. If you are unsure of any ways of using your meter and performing tests, I can explain that to you as well, because that is paramount in finding the problem. Proper use of those things is essential to get correct results.

http://www.bcae1.com/relays.htm

thanks kit car i appreciate that u 2 rage those explenations and diagrams really helped
i understand the relay now u guys are awsome to a newbie like me

ok i have a fsm for a 91-93 240sx w/ka24de in pdf format and i have the fsm for 1986 nissan 200sx "mid year changes" that i ordered off of ebay so im gonna try and get that manual into pdf format for others to download b/c like kitcar said its nothing but research for us guys in the brutal winter states

Dude, if you scan that mid-86 change book up, I'll be like because I've got a very early MK2 or MK1.5 CA20 motor and harness I've had real trouble with pinouts for. The 86 FSM that is loaded here is from early 86, MK1 stuffs only.

Did you find that KA FSM pdf online somewhere? If you did, can you hit me up with the link?

Man, we think we've got it bad, I truely don't know how the Canadian crew does it. 0*F is like a warm day to them. uuugh lol ;D

This is why I'm currently taking my harness inside the house... it's so cold!

And 200sxfrankeinstein, if you find anything useful for the KA swap in your MK1.5 it you be a godd idea to post it up... I'm having trouble for the same reasons!

Im about to dive head first into a KA swap into my MK1.5 and all I hear are horror stories. Anybody found a FSM with the right pinouts etc. ?

does anyone know how to take my fsm and turn it into a pdf?

I think you'd have to scan every single page, but I'm not sure. Maybe one of those copy centers could do it for you, hmmm...

ok so how do i get power to the b/r strp wire b/c the only part of the wire that i see is the part that runs from the ecu. so would i have to splice a wire into that with power to it?

http://www.s12silvia.com/articles/se...ice_Manual.pdf

alright here is the link for the 1986 nissan 200sx fsm. Its not the 1.5 mid year change book but i let 200sxkitcar borrow mine on sunday and he should be turning that into a pdf shortly. if that link doesnt work try this one

http://www.nissanforums.com/general-240sx-...se-diagram.html get em fast b4 the links go dead

Blake, anyone else following along,...

In that online FSM for the 93 240SX, go to the 'Foldout' section, starting with page 3 of 10, is the entire wiring diagram and pinout of what goes in and out of the EFI harness. It also shows the plugs where they attach to the body harness, and their purpose. If you reference back to EL section, page 102, there you have a visual as to what those plugs look like and their location stock. The plug number is also noted on the diagram in the 'foldout' section, so you can directly reference back and forth. I think we've got our answers!

So it looks like the injectors are powered with the red wire, which appears to be also a power for the ECU, and leads to the white plug, which follows all the way down... to the EFI relay. There's the power. All those pages need to be printed out and taped together, and wires traced with a marker or whatever. I bet the reason that COandCA never got spark is because he never had the ECU powered up. That would make a big difference Getting closer, anyhow!! More to come, but sleep for now

already there dude i taped them together on tuesday and highlighted the red wire and the black and red wire and where they go. i started the wiring yesterday but was cut short when i had to pick my son up from school.

ok where does the hose for the brake booster go and ill put up some pics of some of the other vacume lines that i need help with

it draws vaccuum from the intake manifold, so it connects to it.

any updates? im also needing wirng info on mk1 KA24de wiring. hopefully heatw will get back with me becuase he makes plug and play harnesses.