Author Topic: S13 KA24DE dohc to Mk1 CA20E Electrical/wiring Guide (Read 14017 times)

tweaker_s12 · « **Reply #20 on:** 02:30:45 AM / 01-Mar-09 »

when you wired up arro's car, you just run the wires from the s13 harness, where the battier is, across to where the s12 harness is under the air box right? that it right? I'm thinking that you have to hook up relays for the efi and wire up a fuse block. now I'm thinking that i just i need to run the wires to the s12 harness and then the relay that are on the s12 harness will do all the work and the s12 fuse block. if i just splice the s13 harness into the s12 harness like you have stated i will be OK right?

ps: i im so lost in the sauce

David B · « **Reply #21 on:** 08:26:34 AM / 14-Mar-09 »

you run the wires from the batt side where the S13 connectors end up across the bay to the airbox side where the stock S12 connectors are at. its like a 4foot jumper harness, basically.

other than a fuel pump relay if you so desire there are no additional relays that need to be added.

yea i made a jumper harness on my SOHC

just buy those multi color electrical tape from walmart, and just like tape white, to white, on each end,

so when you bunch the wires together, you can remember which one is which

unless you go buy multi colred wire... which is a pain

200sxkitcar · « **Reply #22 on:** 01:54:38 AM / 16-Mar-09 »

No prob. An alternative to what David said with the tape is to purchase 4-flat trailer wiring, which gives you four wires bundled together. I ran two sets of this on Arro's car, and put tape on one set to designate which was which.

BTW, four flat wire has white, green, brown, and yellow wires all grouped together:

Ususally 14 gauge or so.

I built his harness using the 4-flat wire with ends on it, and made everything plug&play so it could be modded easily.

Jay · « **Reply #23 on:** 08:58:46 PM / 17-May-09 »

Another Thing to add to this list. When the Yellow/Red wire DOESN'T work for your factory tach. splicing it in RIGHT after the coil on the KA24DE's on the Green/Black Wire. You oly have about 3 inches of wire. Splice it in there before it goes into a little black box, and that will be right as rain for your tach.
-J

DatsmO · « **Reply #24 on:** 06:57:12 PM / 22-Jul-09 »

where does the red w/ black stripe connect to on s12? there is no mention of it on the color chart. its the fifth picture down with the brown connector for the efi control.

200sxkitcar · « **Reply #25 on:** 01:22:38 AM / 23-Jul-09 »

for a mk1 s12, its not needed, as the chassis controls the EFI relay, not the computer.

That is a multi-purpose pic for other writeups (ie mk2->ka thread) hence extra labeling.

schassisowner · « **Reply #26 on:** 09:54:34 PM / 26-Aug-09 »

Quote from: 200sxkitcar

for a mk1 s12, its not needed, as the chassis controls the EFI relay, not the computer.

That is a multi-purpose pic for other writeups (ie mk2->ka thread) hence extra labeling.

alright i got a few questions as im sorta a noob with wiring.

since the s12 and s13 have the plugs on different sides, couldnt you move the plugs from the DS to the pass side on the main harness?

it would eliminate the excess wiring by not having to route it from the pass side to the drivers side; and the wires that run to the relays on that side could be cut/ and wire could be resodered to make the harness longer to the relays

i know its alot of work but if you use the same gauge wire is there any harm in doing this?

also as stated deleting these plugs (from S13 to s12) and sodering the connections according the the diagram

i did read this is merely a suggestion so to make the harness look alot cleaner

kyskater · « **Reply #27 on:** 07:32:33 AM / 27-Aug-09 »

what i did was run the s13 harness that you splice into uned the center console and ran them where the factory wiring passes through on the ds under dash area. i did this after i hatted th look of the sloppy jumper between the front rails..

VG30_S12 · « **Reply #28 on:** 09:13:55 AM / 24-Sep-10 »

ok i gonna ask, can someone post pics of the engine bay and of the wires and what they did? im more of a visual learner... ive read through several times and cant get it down

Arro · « **Reply #29 on:** 12:42:21 PM / 24-Sep-10 »

There are very few wires but if I get a chance I will try today.

mrjacobwho · « **Reply #30 on:** 10:56:47 AM / 02-Nov-10 »

I finally get it! Hah Thanks!! Theres just one thing, I chose to ground my fuel pump under the hood, but when I looked, the fuel pump wire runs out and away from the plug, connects with the wire next to it, and continues as one. So, if I continue and ground the wire, I would be grounding the both of them. I dont want to ground something that doesnt wanna be. Haha Any suggestions?

Thanks again, Jake

200sxkitcar · « **Reply #31 on:** 11:48:06 PM / 17-Nov-10 »

The other wire is just for electrical shielding, you can ground it at the same place.

ka-tgazelle · « **Reply #32 on:** 09:18:19 PM / 24-Jan-11 »

Not to bring back an old thread but whats the cold start wire? I used your write up for the ca-vg and cross referenced the wiring , because I pulled my vg after tranny blew and now it has a ka-t in it and I need to finish the wiring (which is what 7 wires). So Im doing to write because I think I got it right and want to know if Im correct. So if you could Im gonna pm you a link to the thread once I'm done.

slideurmom · « **Reply #33 on:** 12:19:15 PM / 05-Feb-11 »

so do i keep the harness on the driver side or do i dump it .im so lost lol and can u post pics of where u can find these plugs that u have to splice. thanks

Maxpow · « **Reply #34 on:** 08:28:19 PM / 25-Feb-11 »

I just don't get what the heck I am supposed to do for this. Can someone call me and walk me through or give me a post on this thread that says step by step what the hell we are splicing and what we need as far as materials. Sterling is out of town and I am fucked on this parts order if I don't finish soon.

slideurmom · « **Reply #35 on:** 01:52:43 PM / 10-Mar-11 »

^yes peas ... this is the only thing thats holding me back

ka-tgazelle · « **Reply #36 on:** 02:35:14 PM / 10-Mar-11 »

I just wired a switch connected to the fuel pump ground to turn it on. I think this is ok i know in an accident it wont shut off but i dont plan on crashing.

David B · « **Reply #37 on:** 02:50:01 PM / 10-Mar-11 »

Quote from: ka-tgazelle on 02:35:14 PM / 10-Mar-11

I just wired a switch connected to the fuel pump ground to turn it on. I think this is ok i know in an accident it wont shut off but i dont plan on crashing.

any key ignition source will work.. even where the stock ig coil is, or even on the fusebox (use a fuse tap) bottom left on the interior fusebox, is like engine control fuse, which isnt really used anymore.

Post Merge: [time]08:52:21 PM / 10-Mar-11 [/time]

Quote from: slideurmom on 01:52:43 PM / 10-Mar-11

^yes peas ... this is the only thing thats holding me back

go LOOK, under where the stock s12 airbox is!! the s12 connecters are posted. grab some cleaner, wipe off the dirt from the wires, and locate the simliar plugs posted under S12 PLUGS, and make sure the wires sort of match up!

REMOVE the S12 engine harness, which comes from under the drivers side fender, or just cut if if you dont want to pull the fender.

do NOT remove the s12 chassis harness AKA harness on each sides of the bay, that are connected to RELAYS and such,

but REMEBER, the stock s12 ignition coil wire carry 12 volt power when the key ignition is on! so use that wire for power to a source, or tape it up so it doesnt ground out!

slideurmom · « **Reply #38 on:** 12:36:34 PM / 11-Mar-11 »

Quote from: David B on 02:50:01 PM / 10-Mar-11

any key ignition source will work.. even where the stock ig coil is, or even on the fusebox (use a fuse tap) bottom left on the interior fusebox, is like engine control fuse, which isnt really used anymore.

Post Merge: [time]08:52:21 PM / 10-Mar-11 [/time]
go LOOK, under where the stock s12 airbox is!! the s12 connecters are posted. grab some cleaner, wipe off the dirt from the wires, and locate the simliar plugs posted under S12 PLUGS, and make sure the wires sort of match up!

REMOVE the S12 engine harness, which comes from under the drivers side fender, or just cut if if you dont want to pull the fender.

do NOT remove the s12 chassis harness AKA harness on each sides of the bay, that are connected to RELAYS and such,

but REMEBER, the stock s12 ignition coil wire carry 12 volt power when the key ignition is on! so use that wire for power to a source, or tape it up so it doesnt ground out!

my plugs and wires look different from the ones in the picture .ive looked like a hundred times ,srry for being a noob .

ka-tgazelle · « **Reply #39 on:** 12:44:00 AM / 12-Mar-11 »

I was wondering if any could help me finish figuring out the wiring for my vg to ka-t. I have the car running but the engines only running using 4 wires which i know it runs on more. if some one could help me please I would very much appreciate it. I cant find out what wires are needed to run the ka properly. Yes my car starts but runs really rich right now. I need to figure out the rest of the wiring but no one has really looked in to it like me. So I cant find anyone to help with a second opinion.