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From: Jim Yanik on 5 Jun 2010 19:30
"ian field" <gangprobing.alien(a)ntlworld.com> wrote in
news:_OxOn.60834$BW1.22398(a)hurricane:

>
> "PeterD" <peter2(a)hipson.net> wrote in message
> news:bb9l06dksa9gmiu63a5cee8h6bna0rvv02(a)4ax.com...
>> On Sat, 5 Jun 2010 14:36:08 +0100, "ian field"
>> <gangprobing.alien(a)ntlworld.com> wrote:
>>
>>>Since other people have started posting car electronics questions, I
>>>thought
>>>I'd strike while the iron is hot so to speak.
>>>
>>>Anyone got tech info on the Lucas 9EM ignition module?
>>>
>>>Thanks.
>>>
>>
>> What is it out of, what does it do?
>>
>
> It was widely used on British cars, during the 80's IIRC.
>
> Its a transistor assisted ignition, but I don't know whether its
> points or reluctor.
>
> A couple turned up in a box of auto spares I aquired and it'd be handy
> to figure out how to test them..
>
>
>

open one up and examine it. Or is it potted?

--
Jim Yanik
jyanik
at
localnet
dot com
From: Dave Plowman (News) on 5 Jun 2010 19:41
In article <_OxOn.60834$BW1.22398(a)hurricane>,
ian field <gangprobing.alien(a)ntlworld.com> wrote:
> It was widely used on British cars, during the 80's IIRC.

> Its a transistor assisted ignition, but I don't know whether its points
> or reluctor.

> A couple turned up in a box of auto spares I aquired and it'd be handy
> to figure out how to test them..

I don't think Lucas ever made assisted points systems and all the
electronic ones I know are VR.

I think the unit you refer to was mounted on the distributor, and the most
likely vehicle it was used on in the US the Range Rover. The connections
on the heatsink or mounting plate are to the VR sensor, the other two on
top go to the coil. Some later versions had a three pin connector - the
extra one for a cable shield.

The unit can be reliable but rather depends on how hot it gets. On
vehicles with air con it's likely to have a shorter life.

--
*Why is 'abbreviation' such a long word?

Dave Plowman dave(a)davenoise.co.uk London SW
To e-mail, change noise into sound.
From: RosemontCrest on 5 Jun 2010 20:05
On Jun 5, 2:01 pm, denali <007den...(a)comcast.net> wrote:
> On Jun 5, 12:28 pm, PeterD <pet...(a)hipson.net> wrote:
>
> > On Sat, 5 Jun 2010 14:36:08 +0100, "ian field"
>
> > <gangprobing.al...(a)ntlworld.com> wrote:
> > >Since other people have started posting car electronics questions, I thought
> > >I'd strike while the iron is hot so to speak.
>
> > >Anyone got tech info on the Lucas 9EM ignition module?
>
> > >Thanks.
>
> > What is it out of, what does it do?
>
> As with all components manufactured by Lucas, the God of Darkness,
> it's purpose is to function for a non-specified length of time and
> then fail at the most troublesome moment.

http://www.hermit.cc/mania/tmc/articles/lucas.htm ;-)
From: Dave Plowman (News) on 6 Jun 2010 04:46
In article <idzOn.13964$tY5.13596(a)newsfe17.ams2>,
ian field <gangprobing.alien(a)ntlworld.com> wrote:
> As with all components manufactured by Lucas, the God of Darkness,
> it's purpose is to function for a non-specified length of time and
> then fail at the most troublesome moment.

> *******

> There was much worse than Lucas about - close running for a photo finish
> are Wipac, Czeckoslovakian and Italian.

I'm in the UK, and quite the most unreliable 'car' electrics I've ever had
was on a Bedford van - made by Vauxhall, a GM owned company. With Delco
electrics. The Delco distributor broke its drive on several occasions.
Perhaps GM thought a 4 cylinder engine only needed half the effort to
engineer parts for? The starter and alternator both failed too. All in
under 50,000 miles.

--
*Nostalgia isn't what is used to be.

Dave Plowman dave(a)davenoise.co.uk London SW
To e-mail, change noise into sound.
From: Franc Zabkar on 6 Jun 2010 06:05
On Sat, 5 Jun 2010 20:44:54 +0100, "ian field"
<gangprobing.alien(a)ntlworld.com> put finger to keyboard and composed:

>Its a transistor assisted ignition, but I don't know whether its points or
>reluctor.

Contact points would need significant DC current to wet them, ie to
stop them from becoming oxidised. Magnetic reluctor inputs, OTOH, may
be AC coupled, ie no DC bias current.

I would hook up a 12V supply and measure the short circuit current out
of the input.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
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