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

[Brian]

My 1978 Pantera did not have an external shunt either.
I have posted my ammeter's demise and dissection here, http://www.poca.com/index.php/gallery/?g2_itemId=38317

I replaced it with a new ammeter from Hall Pantera. It is plastic with a plastic mounting bracket, very nice.

One way to limit the amperage going through the ignition switch is using Pantera Electronics ignition switch controller.
I used an older model than is not on Jon's website, mine does not have the push button start function.
Highly recommend.


On Oct 16, 2012, at 9:01 AM, cengles at cox.net wrote:

> Dear Thomas,
> 
> 
> 
>                  I don't recall a factory external shunt on the ammeters on my two July 1974 Panteras, either.
> 
> 
>                                  Warmest regards, Chuck Engles
> 
> 
> On Tue, Oct 16, 2012 at 12:59 AM, Thomas Tornblom wrote:
> 
>> 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
>>> _______________________________________________
>>> 
>>> Detomaso Forum Managed by POCA
>>> 
>>> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>>> 
>>> DeTomaso mailing list
>>> DeTomaso at realbig.com
>>> http://realbig.com/cgi-bin/mailman/listinfo/detomaso
>>> 
>>> 
>>> !DSPAM:507cc94f192422199229964!
>>> 
>> 
>> 
>> -- 
>> Real life:   Thomas Törnblom             Email:	   thomas at hax.se
>> Snail mail:  Banvallsvägen 14            Phone:    +46 18 32 31 18
>>             S - 754 40 Uppsala, Sweden  Mobile:   +46 76 209 8320
>> 
>> _______________________________________________
>> 
>> Detomaso Forum Managed by POCA
>> 
>> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>> 
>> DeTomaso mailing list
>> DeTomaso at realbig.com
>> http://realbig.com/cgi-bin/mailman/listinfo/detomaso
> _______________________________________________
> 
> Detomaso Forum Managed by POCA
> 
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
> 
> DeTomaso mailing list
> DeTomaso at realbig.com
> http://realbig.com/cgi-bin/mailman/listinfo/detomaso