Hi Folks,
The following link has some great articles the Diagnosing Voltage Drop article should be tattooed onto technicians who work in dealerships. Fluke makes EXCELLENT gear my fluke meter is over 25 years old and still going strong. Whenever I check it against a standard cell it is still spot on! Some links are flaky so if so copy the title and do a web search the tire article is copied on the Cole Parmer site.
Regards,
K-Bike

http://us.fluke.com/usen/support/appnotes/default?category=AP_AUTO%28FlukeProducts%29#

As an IT network engineer, I have found that Fluke is the best product in the market.
They are not cheap, but they are very accurate.
With my Fluke, I can pinpoint a network problem in seconds when other people will take days if they don't have the equivalent equipment.

This is the same for measuring voltage. They are very accurate!