My Project S12

Hi!

Like some of you, I'm one of those Mk1.5 owners trying to fit a KA in the S12... The previous owner did the mechanical stuff, but gave up on the wiring and I thought it would be easy as 1,2,3 to sort it out. I was wrong.

So after several tries, several tests, several nights spent wondering why the 1986 200sx wiring diagram didn't show anything like what was going on in my 1986 200sx I thought I would finally make things the right way and unravel the mistery. Plus the car needed some body work... So I started stripping the car, and I thought I'd share this with you and ask a few questions while I'm at it.

So here is the subject:
 ) but I figure it must ride quiet!

The carpet is impressing too... weighs about 25 pounds, almost an inch thick. Far from a Civic!


Now with the questions!
1:Chances are that once in the history there was some kind of finisher over this thing:


2:I need to remove the dash... Chilton says there is a bolt hid somwhere around ths place:


Which is a close up of:

Which is the right side of the dash... I noticed there was some kind of plate that should be hiding the bolt. The thing is I really can't figure out how to take it off. It might soud stupid, but there is no way I can stick a screw driver around it to pry it off... there must be some kind of trick or something?

Well that's it for now. Thanks!

EDIT: Images uploaded thanks JonB!

There should be a plastic part in the very corner of that light strip. The black thing that has the gas light & rear defog light, The one that seperates the dash from metal trim up against the windsheild,the far right corner of that should pop out.
 I like notches. Mine was just like that only made a little earlier.MKI '86 though.
 There's a downloadable FSM on this site somewhere.
 That things buried! We sometimes get that much snow, JAN or FEB and it's odd, you got many many inches. There's a plastic handle with a picture of a gas symble and a trunk that goes on there. I'll bet you could take one off a same era sentra or pulsar. Sorry I don't have one around.
If you click on the last link box at photobucket (IMG) it'll say copied. Open a screen here and one there, when your writing your reply or topic copy that link and move it to the topic and the picture will show up in your text. It took me a while to figure out what people where trying to say in doing that.

JonBThere should be a plastic part in the very corner of that light strip. The black thing that has the gas light & rear defog light, The one that seperates the dash from metal trim up against the windsheild,the far right corner of that should pop out.
 I like notches. Mine was just like that only made a little earlier.MKI '86 though.
 There's a downloadable FSM on this site somewhere.
 That things buried! We sometimes get that much snow, JAN or FEB and it's odd, you got many many inches. There's a plastic handle with a picture of a gas symble and a trunk that goes on there. I'll bet you could take one off a same era sentra or pulsar. Sorry I don't have one around.
If you click on the last link box at photobucket (IMG) it'll say copied. Open a screen here and one there, when your writing your reply or topic copy that link and move it to the topic and the picture will show up in your text. It took me a while to figure out what people where trying to say in doing that.

A knife should get behind it and pry it outward.  It may scratch it a bit, but its an S12 not a show car lol.  There might be some slight indentation where a prying tool is supposed to fit but it may be completely flush, I don't remember exactly.  It shouldn't take much for it to come off.

Where do you live btw?  Thats alot of snow!!

200sxkitcarA knife should get behind it and pry it outward.  It may scratch it a bit, but its an S12 not a show car lol.  There might be some slight indentation where a prying tool is supposed to fit but it may be completely flush, I don't remember exactly.  It shouldn't take much for it to come off.

Where do you live btw?  Thats alot of snow!!  

Yea its got to be colder than hell there.  Crazy amounts of snow.

There are three wiring harness portions in the car.  One is the main ECCS harness.  The other is a dash-specific harness that connects at the Super Multiple Junction (the large block connector that bolts together).  The rest is one harness that runs the distance in the car, from the far left headlight around down the passengers side to the front relay cluster behind the right headlight and then over to the left headlight relay cluster.  Taking the whole thing out requires major disassmbly of the car, I've done it four or five times   become quite proficient at it.  Takes me probably 3-4 hours, but figure double that when you're learning the ins and outs lol, and probably double that w/snow and cold survival!

200sxkitcarYea its got to be colder than hell there.  Crazy amounts of snow.

There are three wiring harness portions in the car.  One is the main ECCS harness.  The other is a dash-specific harness that connects at the Super Multiple Junction (the large block connector that bolts together).  The rest is one harness that runs the distance in the car, from the far left headlight around down the passengers side to the front relay cluster behind the right headlight and then over to the left headlight relay cluster.  Taking the whole thing out requires major disassmbly of the car, I've done it four or five times   become quite proficient at it.  Takes me probably 3-4 hours, but figure double that when you're learning the ins and outs lol, and probably double that w/snow and cold survival!

200sxkitcar

One of the local members and I will be getting together and completing his KA swap with the MK1.5 BS.  He has an updated mid-year changeover FSM that shows what you will need info wise, I would like to get some of it scanned up at least relatively soon, and the work will actually be done when it gets warmer.  All of it will be documented, so it should work in tandem w/your project.  Any other questions as you go along just ask them up, because if you have it I'm sure we will!  Best to figure it out now lol  

Those two things you listed do seem to come up before.  I would bet largely that the coil does indeed need a transistor/ignitor to fire, prob. sourced from the KA car.

Pics are good.  -40??  my balls ice over just thinking about it! Damn!

Cleaning interior parts is also part of the job. Almost 22 years (21 and 11 months) of dust and soil have accumulated on some parts of the car!

My two best friends for cleaning:


They do an amazing job!

Ok, pics now!

First, the starter wire.

As you see on this one, the starter wire really is B/Y, slightly bigger than the other "ordinary" wires. Probably 12-14awg instead of 18-20...


Then it seem that ths wire (the B/Y on top of the others) is the same. I tried, but the car would start on 'on'. I just hope it's not a switch problem... I'll be investigating on this one once the harness is in my house. By the way, this pictures has been taken in the engine bay, on the right side of the car, where the interior harness connects to the lower engine harness.

Second, the coil wire:

A picture of the power transistor that must be taken on the 240sx, or whicher ever car that had a  KA. It's on the right side of the engine bay (left side of the car), bolted on the front of the shock tower. It's either over 100$ brand new or it can easily be hid in a pocket on your next visit at the scrap yard. I think the choice is quite easy to make...

The coil plug is the grey plug downstream of the power transistor. Not the small one wire black one (obviously) but the bigger grey one shown on the picture.

Third, pump wires I have no picture taken yet... I'll just follow the 12v positive wire of the pump (I know which it is) to the relay and I'll know which is the signal wire coming from the ECU.

Now, the none swap related issues... in his eternal search for the "white underdash 10 pins plug" everyone is talk about in their MK2 topics, the previous owner cut the wires from this plug thinking they were related to the fuel pump.

They were cut on the "device end" (meaning the opposite of the harness end). The sunroof and the power windows have stopped to work ever since. I recall noticing these two devices were sharing a wire when looking at the diagrams. The thing is I couldn't find the other end of these... Anyone knows what is the use of this plug? IT has light blue, purple, yellow/red and brown wires. If anyone has the time to take a look at where those wires lead it would be very nice from you!

Second, the turn signal wouldn't work with the handle, but they work with the hazard light button. Then I noticed this:

A red wire has been connected on the turn signal wire (this is a shot from the wire side of the interior fuse box) and on a mysterious Yellow/purpe wire going into the time control unit I think... or it might be in the super multiple junction, I'll check.
This probably is the source of the problem!
There is also a grey wire that has been added, connecting the "on" position wire (on the ignition switch) to another wire in the rear of the car. I'm guessing it used to be equipped with some kind of alarm or something... I'll take pictures of that, probably tomorrow.

So this is pretty much the wire issues I have to get rid of!

And to end it up, pictures of the mess that led me to think I should strip the whole thing and do a nice job instead of the ghetto wiring...


Custom relays, for a test purpose...

I know what you meant now, when you (200sxkitcar) said it was quite a big job to remove the whole harness. I started with the rear of the car and it seems I'll have to take the rear bumper off. The back up lights plug won't pass in the small whole (which was probably meant for it).


Pulling on it like craxy (because I'm dumb and I really wanted it to come out) results in broker wires...

I've passed the lights through that hole before, so I'm not sure.  It did take some working, but the plugs did fit one by one.  I don't recall removing much of the exterior trim, most of everything came out from the inside of the trunk.

AltymanOk, pics now!

First, the starter wire.
 lol!

Nice job man keep it up...

I remember working on the darn mk1.5 lol don't wanna go there anymore even mor when someone else has been messing with everything and didn't know squat about car electronics...

 and by the way...

Joyeux 400e anniversaire!!! hehe c'est rare on qu'on pogne des gars du Quebec sur ce forum la....

Cheers

Tom

tommyNice job man keep it up...

I remember working on the darn mk1.5 lol don't wanna go there anymore even mor when someone else has been messing with everything and didn't know squat about car electronics...

 and by the way...

Joyeux 400e anniversaire!!! hehe c'est rare on qu'on pogne des gars du Quebec sur ce forum la....

Cheers

Tom

200sxkitcarThe ignition should be labeled by those wires as to what does what, if I remember correctly.
Thats the large wire that clips on to the starter, correct?  That goes to a relay which the wire that the ignition should also be connected to.  IE the ignition and the starter are not connected directly.

200sxkitcarThe one-wire black one you are referring to is the small thing with the rubber cover, correct?  That should be a diode if I'm not mistaken.

200sxkitcarAaaa'ight.  Those should be the plugs that come out of the ECU harness, near the ECU itself, one of which has the stuff for the fuel pump, the other of which if I remember correctly has provisions for the automatic trans stuff (like signal wires to the torque converter lockup control box, etc).  I can take some pics of my stock CA20 harness, I doubt the KA is much different in that regard.
Ugh, that is a mess.  That is why I want a better set of guides in the KA section for swaps, so people don't terminate their harnesses.  Because it just makes it more difficult when others pick it up to finish the job  lol!

Ok, a few moe questions...

First, how do you remove the rear bumper? There are three nuts on each side, inside the trunk, 5 or 6 bolts under the car, what else? It won't come out!

Second, the fuel pump harness connects to the main harness with two connectors, and the wires change colors there. I'd need to know which color on the pump side becomes what color on the harness side, if anyone has time to check it out...

I'm almost done removing the whole harness, it should be out of the car by tomorrow.

... anyone?

I'll let you know later today.

OK, maybe a little bit later.  There were some issues with my harness, as you can see.  If you need pics of the other end, as you can see I have several of the entire harnesses as well

I will have to look over your thread again and take a look at those wires, but here is a example of some stuff I loaded up to my photobucket site.  I have on loan a 'Mid-year 1986 Revision' manual, which has this stuff in it.  I took pics of it, bc I don't have a scanner up and running atm.



http://s232.photobucket.com/albums/ee276/S...NissanFSMmid86/

A how-to with pics of the actual harnesses, which plugs, etc is in the works.

Nice thanks!

Didn't have time to work on it though...