S12 ca18det brief pointers

[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



.
.

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



.

[northerner]

I just used the original Three green relays with the wiring intact. It saves all the hassle of wiring it after market ones and you can follow the OE wiring diagram. Looking at yiur diagram it seems to fit the bill. You just have to make sure yoiu have the correct positive with IGN on as mine cut out after the key was released. How does it run ?