Charging system

The #2 push-on terminal on the alternator should also read battery voltage.

With the ignition switch on, the terminal labelled #1, which is fed through an idiot light, a resistor which replaces the idiot light, or a diode should read NEAR battery voltage.

With the engine running, above idle, the alternator should be putting out between 13.5 and 14.5 Volts.

Lets see if you have a alternator it must be a 12 volt conversion. Since it has a internal regulator it is probably a Delco 10si. You may have a 1 or 2 or 3 wire set up. Lets see I guess 3 wire.
You put in a new resistor????? Lets see I do not know of any resistor in the charging system. Are you talking about the resistor for the coil????? Has nothing to do with charging but is only resistor I can think of in a 12 volt conversion.

See where I am going. Tell me am I warm so far. Try to let me know what you have. If I tell you some thing for one system it may not work on another. If you do not know can you take a picture. I would like to help but you got to at least give me some direction.

While most call it a one wire most conversions use a two wire set up. The one wire is very expensive.
Yours should have a jumper wire from the #2 post to the battery post. This tells the alternator when to shut off as not to over charge. If it is a true 1 wire it will not have this wire.
It should have a 10 gauge wire from the battery post to the starter solenoid or battery. This is the wire that charges the battery. Start the motor. Use your volt meter to check volts at battery - and + post. Should be 13-14 volts with running. If only 11-12 volts it is not charging.

Now put red lead of volt meter on battery post on back of alternator and black lead to ground. Is the reading the same. If it is 13-14 here but only 11-12 at battery the 10 gauge wire has a break. If it still reads 11-12 volts at alternator it is not charging.

Now take a jumper wire from battery + post and touch it to the #1 FIELD post on alternator. Did it start charging. If yes your regulator is not leaking enough to start alternator charging. If this is the case you will need to go to the 3 wire set up. If so post back and we will advise how to hook it up. This could be a very real possibility if you did not tell the man that rebuilt the alternator that you were not using the field wire. He would have put in a 3 wire regulator.

Do not worry about the resistor. It has nothing to do with charging. It is there to protect the coil. Your system is 12 volt. If you did not change coil at conversion time it is still 6 volt. If you did change the coil you probably got a 8 volt coil. The resistor is there to knock volts down from 12 volts to what your coil needs to operate. If you supply a full 12 volts to coil it will over heat and burn up.

Post back on a new thread your findings if you need some more help. OK guys...Jump in here and add any info I may have forgot.