[DeTomaso] Ignition resistance wire?

[Sean Korb]

My Pantera has a ballast resistor instead of a resistor wire. It's
mounted near the coil.  When starting the car, the coil gets full
voltage. But when running, the resistor heats up and the voltage to
the coil drops to 8 or 9 volts.  If you have a ballast resistor you
probably don't have a resistor wire.  I have an odd factory setup too
since it's an early car so YMMV.

If you run a 12V coil, you could just eliminate the ballast resistor.
Might boil out a 9v coil though.  I use a Unilite so I need the 9V
system.

sean

On Wed, May 16, 2012 at 11:50 PM, Asa Jay Laughton <asajay at asajay.com> wrote:
> Yup, you may be right (been -not- doing electronics for too long).  When
> I fire it up tomorrow (had a dinner party tonight that I forgot about),
> I'll check the voltage at the BAT terminal.  If it's low, then you're
> right, there still -is- a resistance wire between ignition switch and coil.
>
> Thanks for pointing that out.
> Asa Jay
>
> Asa Jay Laughton, MSgt, USAFR, Retired
> &  Shelley Marie
> Spokane, WA
> ******************************
> http://www.racingagainstautism.com
> http://www.teampanteraracing.com
> http://facebook.com/racingagainstautism
>
>
> On 5/16/2012 7:06 AM, Paul - Home wrote:
>>> The Red and Pink wire set measure 12.4 Volts (isolated from the coil)
>>> when the ignition is ON. (note, I currently have a Battery Tender on the
>>> battery).  This tells me there is not resistance wire from the ignition
>>> to the coil.
>>>
>> I'm not exactly sure, but my interpretation of what you tested won't
>> tell you if there is a resistor here.  I'm assuming that by "isolated
>> from the coil" means you removed these wires from the coil.  If that's
>> the case, you won't see a voltage drop across a resistor in these wires.
>>    You should only see a voltage drop on the Red and Pink wire if they
>> are connected to the coil and the (-) terminal on the coil is connected
>> to ground.
>>
>> Under normal circumstances the resistor is supposed to be between the
>> battery and the coil.  The resistor is supposed to be "shorted" out when
>> you turn the key to start.
>>
>> Paul
>> #9270
>>
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-- 
Sean Korb spkorb at spkorb.org http://www.spkorb.org
'65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
"The more you drive, the less intelligent you get" --Miller
"Computers are useless.  They can only give you answers." -P. Picasso