S12 ca18det brief pointers

[sjef200sxTurbo]

the igniter doesnt connect 2 my ca18det engine-ecu loom but its placed on a separate wirng loom that goes 2 the s13 chassis loom and runs 2 the green relais. I thougt i had a foulty wiring loom but its complete and isnt cut nowhere, 30PSI told me to wire it 2 the relais box with the 3 green relais,Im trying to do that but still trying 2 figure out how to do it correctly

[sjef200sxTurbo]

Ive just found out thru the US site that europen left hand drives (I live in holland) Have that igniter and connected thru the main car harness instead of having a separate loom that connects to the engine harness.

Im thinking of ordering an loom from the UK, does annyone have a conplete DET harness left?

[paulsilv]

Here I have the Instrument panel out




Which wire would I splice into to get the Rev counter working?


Which wire is it I splice into at the Coil Pack side


Is the blue black wire on the white block near the ECU the Temp Gauge wire? Should this be cut and extended to the ECU? Which PIN would it connect to in order to get the Temp Gauge working?


I'd like to thank Pukka for sorting this project out and getting it running just a few more jobs which my budget wouldn't run to with Jon, a bit of tidying and were ready for the shows this summer.

[paulsilv]

Think I've found the info I need if someone can confirm I am right.

TACHO
the 4 wires from the ignitor that go to the coilpacks are the ones you splice 4 diodes onto then join the "cathode" (striped) ends together and join them to one wire which you run to your tacho. There is a light green wire at the back of the tacho, which you cut and join to this wire. You have to remove the instrument panel to get at the connector that has the light green wire in it.

in the pics above there is a light green wire on both plugs into the back of the instrument panel, is it the one on the right as you look at it?

The stripe on the Diodes is towards the tacho, as the current will only flow in that direction.

Someone on Club S12 has spliced in to the tach gauge signal wire, which is part of the S12 primary transistor wiring harness, down near the maf location. Where is this and which wire is it?

TEMP GAUGE
Find the blue/ black wire from the small white s13 plug. connect a wire to it, and run it up behind the instrument cluster. Next snip the purple/ white wire behind the cluster, which is the temp gauge signal wire, and connect the wire that you ran up to the cluster side of the purple/ white wire.

[30psi]

I did it by tapping in to each ground wire that went to each coil and collated them together via the diodes to have the combined signal. Instead of tapping this in to the back of the instrument panel I used the original signal wire from the earth of the original coil. This was on a Datsun by the way but the principal should still be the same. On the S12 I think its the blue wire going to the coil that feeds the instrument, but check.

[paulsilv]

Got the Temp Gauge wired in and working like a dream

But I am stuck on the Tacho wiring.

Wired the 4 Diodes together with the stripe toward the Tacho


An here again from slightly further away showing the 4 seperate wires to be spliced into the coil packs


This is the plug that plugs into the Ignitor with 4 wires coming off it
Fig 1.


If you follow these wires through the loom they eventually end up at this plug. You can see them entering on the left hand side
Fig 2.


And again the same plug closer up
Fig 3.


These wires then come out of the other side of the plug in different colours (As Below) Which are the correct ones to splice into????
Fig 4.


I am completely lost trying to find the original blue signal wire from the original coil. Do I cut and join or Splice ??? Where is this???

If I dont use this original blue signal wire, is it the light green wire I should be using behind Tacho???


.

[paulsilv]

Sorted the Rev counter, worked like a dream.

Started tidying the wiring up, moved the relays about 4 inches, one of the spades connectors came off and started to fizz the loom.

Now back to square one.

Not suffering the cost of sending it off again.

Any help would be gratefully appreciated will post a pic of the relays for any info on wiring new ones back in.

[ScoupeS12]

Oh no mate. Which relays is it, and I'll get you a picture tomorrow when i get to the car if someone doesnt beat me to it! At least you've worked out most of what goes where to the rest of the car loom now though

[paulsilv]

Here are the pictures of the Four Diodes Spliced into the ignitor plug wires that goes to the coil packs.

[paulsilv]

With regards the Relays This Is What I Have been left with.



And Again in a Diagram



.
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Is This Below What I Should Have? If Pukka Could Clarify This that would be great



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