Hank, the last two letters of your post explain the problem precisely- - - - -EE!
Try doing it in the real world for a while, where theory runs head-on into actual facts and figures! My brother has those same letters after his name, plus PHd. He has the added advantage of being an ASE certified Master Technician with real, hands-on-the-wrench experience to go with his theoretical pipe dreams! All I've done is troubleshoot and repair cars, trucks, buses, construction equipment, airplanes, boats, and industrial equipment since the mid-1950's, with a specialty in DC electrical systems.
The SAE (Society of Automotive Engineers) specification for acceptable 12 volt battery testing results is 9.6 volts or above, measured at the battery posts, after a load test of 15 seconds at 1/2 the Cold Cranking Amps figure. Load a 500 CCA battery to 250 amps for 15 seconds, measure the terminal voltage with the load still applied, and the voltaqe should be at, or above 9.6. The electrolyte specific gravity should be 1.250 or above to assure an accurate test.
Jerry
Last edited by Hotrod Lincoln; 06/01/2010 8:47 PM.
