2). If you have changed from Positive Ground to Negative Ground and leave the ammeter as it was there will be no damage. The ammeter will, however, read in reverse. That is it will show a discharge when the alternator is charging the battery instead of the other way around. All you need to do to rectify this is reverse the wire at the back of the ammeter.
As to positive and negative ground. There are 6, 12 and 24 volt systems which use negative ground as there are 6, 12 and 24 systems which use positive ground. The battery does not charge any better or any worse with either system. Some alternators will not, however, tolerate being wired up as positive to ground; they blow diodes.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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