On 02/18/2015 6:09 PM, Sparky wrote:
A second test of the cables, this time using an ESR meter capable of
measuring hundredths of ohms and able to null test lead resistance.

(-) battery cable, from battery terminal to chassis: 0.02 ohms;
(+) battery cable, from battery terminal to starter solenoid: 0.05 ohms;
Alternator cable, from alternator to starter solenoid: 0.33 ohms.

These measurements were done with (-) cable disconnected from battery post
(no potential across cables) and test leads nulled.

So 35 amps charging current over 0.33 ohms pretty much drops the full 12
volts.

I'll look into wiring and terminal issues.

Thanks to all who helped.


Um, the 12V drop would only be if the alternator cable wire was shorted
to ground/chassis. You would then be dissipating something like 400
watts through that wire! Ouch!!

It is the total resistance of the circuit that counts, not just one part...

John :-#)#
--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."