On my 66 diesel specifically, what is the correct wiring for a one wire alternator with an amp gauge?  Right now mine goes from the terminal on the alternator, to one post on the ammeter, from the other post, to the positive terminal on the battery. 

I'm only getting it to charge when I unhook the link to the positive terminal and hook it back up after it's running.  It won't just charge when I start it.  Is that normal and I just need to put it on an ignition switch?  I also get a positive &quot;charge&quot; signal on the ammeter when I turn my lights on.  I guess this might be normal too because the alternator is compensating for the extra draw of the lights?

Can anyone confirm or deny this?