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Brett

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Doncaster, South Yorkshire

i think my module has packed up is there a way to test it?

I had to go work so didnt test it much, the coil is getting live feed but not getting the pulse to ground to fire it any thoughts?
What connections to the module is there i think i could see +ve feed and coil-ve

cheers

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Rod S

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There are three types of module, the very early one mounted seperately, the two pin one on the dizzy and the three pin one on the dizzy but theyare all essentially the same, only two wires connected - the three pin one only uses two of the pins.

There are actually three connections, the two wires and earth (through the mounting lug/dizzy body), one wire positive down from the coil positive and the other to just switch the coil negative to earth. If there is a second wire off the coil negative it is to a rev counter.

So theoreticaly you could test it by taking the wire(s) of the coil negative and connecting to a 12V bulb, other side of bulb to 12V (coil positive) but, TBH it's easier just to swap the module for a known good unit.....

Measure the coil resistance first though (with wires off) to make sure it hasn't gone open circuit - the coil is different for the electronic ignition but often get swapped for the wrong one leading to failure of coil or module, usually the module unfortuntely.

You can get the modules NOS off eBay for about £10 occasionally.

EDIT - one last point, the modules should be mounted with heat sink compound, lack of heat transfer is another cause of early failure.



Edited by Rod S on 24th May, 2010.

Schrödinger's cat - so which one am I ???


Brett

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Doncaster, South Yorkshire

i did reply to say thanks Rod but my phone must have not uploaded the new page correctly,

anyway the coils i have measure 2 and 4ohm (2ohm being on the car)

the module did flash a lamp for about 15 seconds then died exactly the same as last night, it fired up idled for a minute then skipped afew beats before die-ing

my logic tells me if i pulse the -ve coil terminal to ground i should get a spark, i dont on either coil so im unsure if the coil(s) are duff too
so i set on to dig out a points dizzy, and fitted it i couldnt get a spark out of that either, hmmm im wondering if i should order another coil aswell,
this is what i have currently http://www.minispares.com/Product.aspx?ty=...id=33876&title=

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John

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Mongo

Barnsley, South Flatcapshire

That coil is no good for the 65DM4 dizzy. You will probably have blown the module. you need http://www.minispares.com/Product.aspx?ty=pb&pid=36483

and quite probably a module off ebay. there are quite a few of them on there at the moment but they are around £30-£40

If something is worth doing, it's worth doing half of.


Rod S

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Rural Suffolk



On 24th May, 2010 Brett said:
i did reply to say thanks Rod but my phone must have not uploaded the new page correctly,

anyway the coils i have measure 2 and 4ohm (2ohm being on the car)

the module did flash a lamp for about 15 seconds then died exactly the same as last night, it fired up idled for a minute then skipped afew beats before die-ing

my logic tells me if i pulse the -ve coil terminal to ground i should get a spark, i dont on either coil so im unsure if the coil(s) are duff too
so i set on to dig out a points dizzy, and fitted it i couldnt get a spark out of that either, hmmm im wondering if i should order another coil aswell,
this is what i have currently http://www.minispares.com/Product.aspx?ty=...id=33876&title=


2 ohm is the more likely correct one although it may be a ballast coil (electronic and ballast are very similar resistance but different impedance that you can't measure easily).

Pulsing the negative side of coil to ground won't prove anything really, (a) it works the other way around, coil is "charged" at 12V and sparks when ground is released and (b) in a non-electronic scenario, the condensor (actually a capacitor) in a points dizzy provides part of the charge or at least controls the rate of discharge.

However, either coil should work with a dizzy if it is in good order but remember the wiring is different.

New modules,

3 pin
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...e=STRK:MEWAX:IT

2 pin
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...e=STRK:MEWAX:IT

Don't be put off by the poor descriptions, these are the correct ones (non-gen rather than NOS), use the Intermotor database
http://www.intermotor.co.uk/?p=smpeurope/c...4sdq5o9o0krk191

and enter Intermotor part numbers 15420 and 15410 to verify Metro fittment and lucas etc equivilant numbers.

Some people on eBay just advertise things poorly.

EDIT - typo

Edited by Rod S on 24th May, 2010.

Schrödinger's cat - so which one am I ???


Brett

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Doncaster, South Yorkshire

cheers john i was just looking at that one it will need a ballast aswell i assume as my coil gets full 12v, minispares module is only 35 quid might aswell get all the bits from them, my local motor factor is difficult when it comes to things like this

edit, again thanks alot Rod:)

Edited by Brett on 24th May, 2010.

Yes i moved to the darkside *happy*

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Rod S

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Rural Suffolk

On 24th May, 2010 John said:
That coil is no good for the 65DM4 dizzy. You will probably have blown the module. you need http://www.minispares.com/Product.aspx?ty=pb&pid=36483

and quite probably a module off ebay. there are quite a few of them on there at the moment but they are around £30-£40


See above ^^^

£10 if you search on the Intermotor part numbers :)

BTW Brett, I didn't check the MiniSpares part number but the original electronic ignition coils actually had "for electronic ignition only" printed on them. A lot of aftermarket ones don't but "may" still be correct.

EDIT - and if you do want to try your local Motor Factor just quote the Intermotor part number, they should have a cross reference catalogue to whichever make they sell as the Intermotor part number is the one that is cross referenced the most in my experience (that's why I always use it on searches and their database is superb and easy to use, and free....)

Edited by Rod S on 24th May, 2010.

Schrödinger's cat - so which one am I ???


Brett

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Doncaster, South Yorkshire

cheers for the input both of you i think this pic is about as good of an answer as im going to get :) a module and coil are on order,

thanks for the intermotor website, so much information on there

for reference i bought coil - intermotor 11410 ( GCL143 minispares)
and ignition unit - intermotor 15410


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Edited by Brett on 24th May, 2010.

Yes i moved to the darkside *happy*

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Brett

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Doncaster, South Yorkshire

parts ae here already, fired up first time, i thoroughly cleaned the dizzy whilst it was of too :)

Yes i moved to the darkside *happy*

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Rod S

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Rural Suffolk

Good to hear :)

if only my problems were so easy..... *frown*

Schrödinger's cat - so which one am I ???

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