Posted by Bob M on September 05, 2011 at 08:08:25 from (69.207.87.100):
In Reply to: amp meter questions posted by charlie M on September 05, 2011 at 07:31:53:
Charlie - A couple possibilities:
1 - If you can "tap" the ammeter needle to any position is says the new ammeter is defective (ie. the movement is sticking). A good ammeter will center itself at O almost instantly with no current flowing.
2 - If the ammeter deflects either direction when you make the battery connection you've got current draw somewhere. Could be as simple as the light switch left on. However a bad alternator (failed diode or regulator) will also do it. Also a short somewhere in the wiring.
Note also: If the needle defects to the + (charge) side when you connect the battery, is means the connections to the ammeter are reversed. Solution is to swap the wiring at the two ammeter posts.
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