www.watsons-streetworks.com sells a booklet on wiring autos and has the best generic diagram I have seen. Also have a diagram from the January 1983 issue of Hot Rod. They both show and comment that the only wire that attaches to the positive side of the ammeter is the 12 volt positive wire (10ga.) from the battery connection on the solenoid. Also shows the alternator and all feeds attached to the negative side of the ammeter. I certainly agree with you that the voltmeter is by far the best, and easiest way to moniter the charging system. Watsons book shows your way and another way of wiring the ammeter and explains why they are wrong. Sorry I don't have it in hand right now so I can comment on that. I will look it up this morning. Regards, Sam.
