Keith - With the ignition switch "off" you should read battery voltage at both the BAT and #2 terminals, and 0 volts at the #1 terminal. (All readings to ground...)
You should also get the same readings with the ign switch "on" and the engine not running.
With the engine running (alternator charging) you should get 14.0 to 14.5 volts at the BAT and #2, and 11 - 12 volts or so at #1.
As other suggest, with the engine running many digital voltmeters read incorrectly on account of system "noise" - an old analog meter is the preferred tool here...
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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