Time for an update and a warning on volt meters.
If you have a multimeter, such as the Sperry SP-152A, it runs on 2 AA batteries, and batteries can leak acid. Replace batteries as soon as they get weak, and that's one of the nice features of the Sperry meter. I can remove the 2 batteries and test them on the very meter they came from. The batteries are only needed to measure OHMS, and for the continuity feature on the Sperry.
Well today I went to measure ohms on a Model A coil and found the meter didn't work. I found one of the Eveready batteries has leaked a bit on the negative end. It cleaned up easily with a small stainless brush and hot water. I then dried the contact and applied grease to the 4 battery ends and installed new batteries. Greasing the battery ends is a good idea for clocks, flashlights, smoke detectors, or many other such devices that use batteries.
Here is a link to a cheap but good meter that measures 0-10 volts DC. This is easy to use and can be handy to carry in your car. If you use a 12 volt battery, then you can buy the same thing in 0-15 volts DC. You simply need to add a couple wires and alligator clips to the meter.
http://www.ebay.com/itm/1x-DC-10V-A...881580?hash=item3ce79d456c:g:8CMAAOxy2BBSUjHt