which sensor is the tach?>on the tranny, and which plug goes into it

or is it on the distributor


if so which wiresA\! COME ON I AM GOING TO THE DRAG STRIP like tomorrow i need to have this one guage working

The tach goes to the - side of the coil, not the trans.

is that the same for the KA's? I wasnt sure, I know what you said is right for normal S12's Randy.

It depends... for earlier KADE's and KA-E's like David's, it's off the coil.

Any of us with 95 and up DE, we have to tap off a wire on the distributor because the coil is integrated into it.

so which wires off the ecu harness are the tach?

and where do i solder them too

okay come on guys

there are a bunch of active threads that have nothing to do with s12's

i need my tach working can anyone just run me down of which wires need to go where, i know which ones are on the cluster, but i dont know wtf i solder them too

i dont have pinouts, or a ka infront of me, but i bet nicoclub.com has something that can help you.

or search ka-t.org they'll have them too.

check my build thread, post #126. everything you need to know:)
http://www.club-s12.org/forums/index.php?s...9240&st=120

sickness! exactly what i was looking for




i like your car reminds me of mine but yours is better

actually, looking back at the pictures i dont understand where the light green wire is going in all those wires lol

thanks:). it goes down to the s.m.j.(super multiple junction), which is under the dash behind the fuse panel. it then goes to the engine compartment to those original three plugs you had to spilce under the maf. mine was gone amungst my wire cleanup task, so i splice by the s.m.j.. which would be fine for you. the lead wire comes off the white plug on the ecu end of the ka engine harness.

okay i follewed sterlings little write up


i DO, have a wire, bunched with all my other wires under where the stock s12 maf,

it comes out, and goes to the ecu harness on some wire. i forgot
but my tach isnt working so ill double check

im going to check, which wire is which, and post right back

okay its kinda dark but i think from HERE


its blue/white





to HERE

which is yellow/red




so thats wrong???

bleh blaah?

There have been issues in the past with getting the factory Tach to work. In fact the tach for a KA-E will not even work with a KA-DE. The stock KA ECU tach signal to cluster is the (white long flat plug KA-E) or (long brown flat plug KA-DE) and the wire colour you're looking for is the yellow wire with a red tracer. But when we used this wire as a signal we could not get it to work with the cluster. now running a wire from the neg terminal of the coil to the cluster may work...I have not tried that...

i took that yell/red wire and spliced into the light green pictured above and my tach worked. just do it like that. look behind your gauge cluster and trace the wire. the cluster is held on my 4 screws, there only 2 to get the cover off around the cluster. really easy, and i bet your tach will work, MINE DOES. yellow/red to the wire behind the cluster and bamm...doooo it

okay. yellow red wire to the wire behind the cluster, ill clip it in and see what happens thanks

i ended up splicing it down by the smj after following the wire i found behind the tach since my ecu is on the pass. side. its your choice. hopefully it works for you.

oh that seems easier, isnt that like a foot from each other? my ecu is in my glove box

yeah, its close. btw, dont cut the wire, splice into it. glove box mounted ecus ftw! sooo much easier to pull codes!

haha ill use what u did. they sell thos clip splice things at wal mart


yea is ure ecu in ure box?

yea, mines in the glove box.

i used those wire clips only to splice when i was trying to figure out which green wire it was. if i remember right, there are 3 light greens in the bunch of wires at the smj. those would be used for a temporary connection.

once i found it i cut the rubber off the wire and wrapped my jumper wire around the exposed wire then sottered it for a good connection.

okay im pounding it into my head, after work i gotta check this out


drift day is next saturday no tach or half suspension im going.

id rather have all that worked out though

thanks for the info

Man if your watching your tach that much, you should try to learn the noises of the engine to know when instead of needing the tach lol. Most of my manual cars havent had a tach, the corolla didnt come with one from the factory in manual cars, only auto's had tachs....how stupid.

while im sideways i usually watch the rpms around 6 thousand, or redline whatever, when i hit that i try to let off just a tad so i dont break something


that was with the ca20e




plus, no tach, means no speedometer (i use the tach for speed) like 3800 rpms is 60 mph or whatever in 5th gear


since i have no speedo

FUCKKK

i hooked it from the tach directly to the ecu still no worky


does it coem from the dizzzzzyy, or the ig coil?

if you were using the little clip things, they sometimes dont break thru to the wire all the way. either that or you sliced into the wrong wire. theres 3 coming off the tach, theres only 1 that works.

i didnt use the clips i stripped the wire bare with a lighter


3 off the tach? i thought it was the green one, the light green

this shit is so god damn fucking retarded wtf

i drift sunday

does anyone know how to just hardwire it all up, from the ig coil, which wire, to the tach, the ground..

why does the tach go to the ecu

i still dont ahve a working tach, i tried all that was said...

lol get a 5" tach

or do like me and feel it out

i would buy a tach but i dont think it would work either

all you need is to run a wire from your negative terminal on your coil, to the tach... so figure out wich wire comming off of/going into your coil is the negative, and then splice a wire onto that, then run it all the way up to your tach... simpler than trying to trace wires and figure them out and all that... and you kow the wires nice n new.. lol

I bought cheap little tach gauge, and thats the gist of the instructions...

see butt he previous owners fucked my shit up, they went from digital cluster to anolog,

so the ground might not be right or some gay ghetto crap.



so your saying, if i buy a after market tach, ground one side, and hook the other to the coil it should work?

umm.. no.. on your coil, theres a positive, and a negative wire, and then your big fat coil wire to the distrib or whatever. From what i've read, your coil is built onto the distrib?? anyways, there should be a negative and positive wire on the coil. Your tach hooks up to this wire. The tach also needs power and stuff too, but thats minor. It should have instructions with it to hook it up if you do buy one. Just make sure its for the same amount of cylinders as your engine. (The one I have is El-Cheapo to the 4th degree, and it has a selector on it 4-6-8cyl (and then something to do with rotary engines as well))

If i understand it right, the signal to fire the coil off is run throught the ground side of things, so it basicaly takes the number of trigger signals, and divides it by your cylinders and thus gets your RPMs

Also, I belive its possible to tap into it from the trigger wire from the ECU to the coil, which is what the negative is anyways.

Now i also think theres some that run in opposite polarity setup, and they hook up a little different. Same, but wired in slightly diff... Im sure you should prolly be going the negative route... personaly, I'd check through the wiring diagrams myself before I started... however, on my Ca20e, the blue wire, white stripe is, im almost 100% sure, the trigger wire for the primary coil.

But your car is all re-wired and different ecu n stuff... what i would do is find the pinouts for the ecu you have, find the pin for the coil trigger, and find out if its neg or positive and then wire your tach from there. The coil doesnt fire unless that wire tells it to...

so yeah, either find it at the coil, or find it at the ecu, then run a wire from there to the tach itself... should work jsut as fine with the cluster thats in the car as well... I have a digi dash, and have installed all aftermarket gauges aside from the speedo, which is next on my list... my digi dash is all sketchy...

i tried that wire, off the ecu, the one that says tach, that didnt work


oh wait a second


am i supposed to bridge, the ywllow red, from the s13 ecu


to the blue and white, off the s12 chasis harness where my old coil used to be? i dont use that because the new s13 coil is on the harness plug


but what if i hook up the ecu wire, to where the old coil was.... would that work>??

hmm... okay.. im not sure which is which. ie coil wire is yellow/red (so I assume, yellow wire, with red stripe)

Now- If you used the s12 harness, then there would be a blue n white wire going to your coil. if not, and you used the s13 harness/made one then the yellow/red wire out of your ecu (You are using the s13 ecu right??) is the one you should be tying into to go to the tach input wire...

the best thing i could suggest, as I dont know how everything else is wired in, is to just hook up to that yellow/red wire for your tach.

i already did...... thats why i started the damn thread lol. because the yelow red wire doesnt work

for those of you who don't know which wires to connect.. here's some pics to help with the tach.
(please excuse the wide angle lens)

[My Setup:]
[CA20E >> KA24DE S13]



Coil:


Cluster: (kinda hard to see but it's the White Wire connected to the Light Green. But you all knew that already.)

Thread from the dead!

That's what I did too. Except I ran a jumper from the factory wire to the green wire at the KA coil