Battery draining fast

Okay, I didn't think anyone still made the old vibrating relay type of regulator, everything I've seen lately has been an electronic version. It's not a problem, it will work, although not the best for long life.

Take your meter and set it to the lowest ohms range on it. Now touch the two meter leads together. The meter should read zero or close to it. Some meters have an adjustment that you can use to make the meter read zero when you touch the two leads together, if yours does, use the control to make the meter read zero with the two leads touching together. If yours doesn't have a zero adjust and the meter reads something low like 2 or 3 ohms remember that number.

Now, put one meter lead on the alternator case and the other on the field terminal with the tab connection that you connect the green field wire to. The meter should read 4 to 5 ohms. That is the field coil resistance. If your meter did not read zero with the leads together, subtract that number I asked you remember form the number the meter reads on the field terminal to the alternator case. The result should still be 4 to 5.

Now take the meter lead that you had on the field terminal and move it to the screw in the center of the other brush holder. This time the meter should read zero or the number you got when you touched the two meter leads together.

Let me know what meter readings you obtained.