<VV> sick 64 again

[Sethracer at aol.com]

Think of a voltage reading as a "potential" amount since Voltage is "the  
electric potential difference between two points" (per wikipedia). So a 
voltage  reading of 12 volts at the coil is before (virtually) any current is 
flowing.  When the current flows, as Bob describes, the resistance wire drops  
(absorbs/dissipates, etc.) the potential voltage available at the coil. -  
Seth 
 
 
In a message dated 9/17/2013 10:27:43 A.M. Pacific Daylight Time,  
BobHelt at aol.com writes:

Ray,
Wires are designed to have a very low resistance to  current  flow, so 
normal wires have little voltage drop or loss. But  the RESISTANCE wire  is 
designed to have a fairly high resistance to  current flow. this is defined 
by  
Ohm's law as E=IxR, or voltage  equals current times resistance.Thus when 
current  flows thru the res  wire there is a voltage drop across it. When 
the 
points are  open, no  current will flow thru the res wire and thus the 
voltage 
drop across   the res wire is zero and the 12 volts appears at both ends of 
the 
res  wire. But  with the points closed, current does flow thru the res wire 
 
(when the starter  isn't activated), and there is a 4-6 volt drop  across 
the 
res wire. This drop  lowers the voltage that gets to the  coil to about 6-8 
volts.
HTH

eEgards,
Bob Helt


In  a message dated 9/17/2013 9:31:48 A.M. US Mountain Standard Time,   
corvairgrymm at gmail.com writes:

My  understanding (this caused  me much confusion before I was told) is that
the  points MUST be  closed (or a test lead used to ground the negative side
of  the coil)  in order to get the reduced voltage reading showing the
factory   resistor is intact.  Without doing this you will read the full   
12
volts.

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