[DeTomaso] Factory Shunt? was Re: Ammeter, was Re: Key difficult to turn

[Thomas Tornblom]

No external shunt on my stock Veglia ammeter, 1984 GT5.

Thomas

2012-10-16 04:40, MikeLDrew at aol.com skrev:
>
> In a message dated 10/15/12 17 43 23, guido_detomaso at prodigy.net writes:
>
>
>> There was a factory shunt?  Guess I missed a few episodes here...my car
>> is a '73
>> though.
>>
>>>> Check out this photo:
>
> http://www.poca.com/index.php/gallery/?g2_itemId=38308
>
> The interesting part (the shunt) is unfortunately a bit out of focus.
> This is a NOS ammeter that I lifted out of a Ford box.   It's my understanding
> that this external shunt was standard.   I think the ammeter in my '72 also
> has this shunt installed.   Note that it's electrically hot all the time and
> completely lacking any insulation.   DOH!
>>
>>> The shunt I took off I made long ago, before the internet.  The needle
>> stopped
>> moving over time, something I wanted to address.  But a shunted gauge with
>> a
>> non-moving needle beats walking home.
>>
>>>> Indeed.
>>
>>> And so am starting to question the wisdom of this whole project.
>>
>>>> As am I.   I suspect your original shunt was too shunty; that is, too
> much power was going past the gauge instead of through it.   You can see the
> original one is just a thin piece of brass.
>
>
>>> Has anyone
>> used the existing red wire off the ignition switch, that powers
>> everything(?)
>> that goes on and off with the key, to only trip a relay, switching power
>> from a
>> new third wire off the ammeter?
>>
>>>>> I *think* that this is the scheme that Rick Moseley's relay kit uses,
> although he ties into the fusebox, not the ignition switch.   But I think what
> he does is have you unplug the red wire (that goes from the ignition switch
> to the fusebox) and plug it into one of his wires, which then goes to a
> relay, and the output from the relay then goes to the fusebox where the
> original red wire hooked up.   I *think*.
>
>>> Taking just the fan current out of the ignition switch doesn't take all
>> the
>> current away, as I'm finding out.
>>
>>>> True dat.   But it certainly removes the largest consumers...
>
> Mike
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-- 
Real life:   Thomas Törnblom             Email:	   thomas at hax.se
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