74 dart sport won't charge

First, NEVER pull a battery cable off a running car. IF the system is charging, this generates a large voltage spike. Also, it does not actually prove anything one way or the other.

I generally think in terms of "sections"

components, alternator, regulator, battery. Remember, "new" does not mean "functional."

output wiring, or "charging line." On a factory car, this involves the above mentioned bulkhead connector, subject to problems, the ammeter, and other wiring weak points

Field wiring.

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WHAT YOU NEED. A multimeter, a 12V test lamp, two or three alligator clip leads, and a side issue, a spark checker, for ignition problems. ALL car owners should have these in their box

A FACTORY service manual, which you can download free, and a wiring diagram of your car, also in the factory manual

http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617

More here

http://www.mymopar.com/index.php?pid=31

Also there at MyMopar are simplified, sometimes easier to follow non-factory diagrams

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WHAT TO DO

Start by making some very simple checks. Turn the key to run. Take your meter and check voltage at the blue field wire on the alternator. Do this withOUT disconnecting the wire. You want it "as normal." Should show "same as battery" voltage.

DISconnect the green wire, in subdued light if possible. You should see a small spark. Take one of your clip leads and connect that alternator terminal to GROUND.

Start and run the engine, bring up RPM easy, and watch the ammeter. It should show a charge. It's a good idea to monitor battery voltage with your meter while doing this, don't allow the voltage to go much above 15--15.5 if you can help it

IF you do NOT see this voltage, leave the key in "run." REcheck voltage on the blue field wire at the alternator, still with the "clip lead" on ground. Should be close to battery voltage.

Clip your meter from ground to the big alternator output stud. Run the engine again, bring up RPM. If voltage stays "low" 12-12.6 or less, it's not charging at all.

If the voltage goes "nuts" that is way high, 18V or so and the ammeter does not show a charge, then there's an "open" in the charging line, most likely the bulkhead connector

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