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Coil wires

Started by _lxhatch_jim_ , Jun 19 2006 02:41 PM

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15 replies to this topic

#1 _lxhatch_jim_

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Posted 19 June 2006 - 02:41 PM

I've just reinstalled my distributor and coil. I've got the dizzy wires and tacho on the correct respective coil terminals but there are two wires remaining. What colours go where or better still, where to they start? (Ignition goes to........?) I really hope to crank the old girl over after a 6 month break and this is the last step.

Cheers
Jim

Edited by lxhatch_jim, 19 June 2006 - 02:41 PM.

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#2 Struggler

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Name:Andrew or AJ
Location:Canberra A.C.T.
Car:UC Sedan
Joined: 08-November 05

Posted 19 June 2006 - 03:05 PM

What colours do you have ?

Yellow goes to coil +ve.

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#3 _lxhatch_jim_

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Posted 19 June 2006 - 03:30 PM

I'm at work at the moment so I can't check but from memory yellow, black and green, possibly a blue one too. I know green is tacho but I'm not even sure if the others are "from factory" wire/colours. If you know what the others could be for though I'll chase it from the source to the coil.
Anyway, any help much appreciated.

Cheers
Jim

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#4 _hrt1and2_

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Posted 19 June 2006 - 07:05 PM

one of them may also go to the oil pressure switch??? maybe blue?

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#5 _lxhatch_jim_

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Posted 19 June 2006 - 08:42 PM

Almost all sorted. Green is tacho - to -ve, Yellow goes to +ve, blue is at the oil sender, only one left is black.......... flip a coin?

Cheers
Jim

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#6 _JBM_

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Posted 19 June 2006 - 08:54 PM

Black goes to negative from the dizzy condensor.

I thought the tacho wire should go to the positive?

James

Edited by JBM, 19 June 2006 - 08:59 PM.

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#7 _lxhatch_jim_

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Posted 19 June 2006 - 08:57 PM

Lock it in. And from the dizzy (commodore) green to -ve and pink to +ve. Surely nothing can stop me now. Surely.........

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#8 _munro_

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Posted 20 June 2006 - 12:34 AM

Lock it in. And from the dizzy (commodore) green to -ve and pink to +ve. Surely nothing can stop me now. Surely.........

famus last words

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#9 _lxhatch_jim_

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Posted 20 June 2006 - 09:41 AM

I thought the tacho wire should go to the positive?

It's an aftermaket tacho and apparently to negative. I've got an SL/R dash to put in later and I understand that goes to the +ve. This is very confusing. But as I said, nothing can go wrong now.

Cheers
Jim

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#10 _devilsadvocate_

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Posted 20 June 2006 - 09:48 AM

Im assuming you have a points dizzy here, and the wires are the ones in the car loom?
nb: tacho gets its signal from the terminal of the coil which changes in voltage, the terminal connected to the dizzy...should be the -ve, it goes from 12v to 0v every time the points open and shut. The +ve terminal remains at a constant 12v.

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#11 Dr Terry

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Posted 20 June 2006 - 10:36 AM

Hi Guys.

I'm with devils' on this one, the -ve terminal of the coil is always the tacho signal wire (brown for factory tachos).

Some aftermarket tachos say to run their wiring to both the +ve & -ve of the coil, this is only to get a +ve supply to the tacho instead of going to the fusebox or similar. The -ve is still the signal wire which is often green for aftermarket tachos.

Dr Terry.

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#12 _devilsadvocate_

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Posted 20 June 2006 - 12:07 PM

That raises and interesting point ^. If some aftermarket tachos say to run the power supply of the +ve of the coil, does it matter whether there is a resistance wire powering the coil?
reason: conventional yell holden wire to + of coil will oscillate between 14 and 10V with the opening and closing off the points. This would give an average reading somewhere between this. Would it be critical what voltage the tacho runs at, and also would the tacho create a significant load on the ignition wire (1A would be significant) which would lower the voltage to the coil?
I wouldnt run anything of a resistance wire apart from the coil and trigger relays.

Edited by devilsadvocate, 20 June 2006 - 12:09 PM.

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#13 Dr Terry

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Posted 20 June 2006 - 12:18 PM

Hi devils'.

Yes, you're dead right, the aftermarket guys not have taken the ballast resistance or any voltage drops into account. Many aftermarket tachos are poorly made & not accurate, so it's probably not an issue anyway.

Dr Terry.

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#14 _lxhatch_jim_

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Posted 20 June 2006 - 04:47 PM

Black goes to negative from the dizzy condensor.

I've got the condensor wire hooked up but there is another black wire coming from the loom with the yellow (to positive) and green (tacho to negative). Does anyone know what this is from or which terminal is goes to.

Cheers
Jim

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#15 _devilsadvocate_

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Posted 21 June 2006 - 12:44 AM

Jim, green wire, does it come from the main wiring connector, the only green wire that should make it from there is the wire going to the temp sender. If you havent had a tacho fitted b4, then there wont be a tacho wire there, the fact wire should be brown...if it was there.
You're putting in a commodore electronic dizzy, have you made modifications to bypass the resistive ignition wire?What is the black wire connected to.....cant be your points dizzy if you have the electronic dizzy.
You may also have some emission control wires mixed in there, are there wires going to the temp sensor on the cylinder head between 2 and 3 spark plugs.

Edited by devilsadvocate, 21 June 2006 - 12:46 AM.

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#16 _lxhatch_jim_

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Posted 21 June 2006 - 08:45 AM

There is a green wire for the temp sender but there is also another green wire from the tacho (aftermarket) - that I did myself. The black wire, coming from through the firewall, with the yellow wire I attached to the +ve terminal. I figured the only things on the -ve should be the tacho (the green wire I installed) and one of the wires from the commodore dizzy. It was all running before I pulled it apart to change the cam.

Success last night too - after a good dose of carby cleaner down the triples it fired to life. All that's left now is to tune them, and then re-tune them and then tune them again. :<_<: